./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/const_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/const_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa --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 806c78936017d752a8835e8cd9fbe8a1f06095f8d4eacbf3053870dd4f98f68e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:10:21,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:10:21,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:10:21,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:10:21,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:10:21,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:10:21,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:10:21,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:10:21,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:10:21,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:10:21,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:10:21,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:10:21,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:10:21,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:10:21,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:10:21,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:10:21,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:10:21,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:10:21,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:10:21,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:10:21,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:10:21,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:10:21,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:10:21,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:10:21,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:10:21,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:10:21,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:10:21,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:10:21,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:10:21,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:10:21,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:10:21,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:10:21,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:10:21,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:10:21,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:10:21,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:10:21,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:10:21,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:10:21,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:10:21,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:10:21,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:10:21,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:10:21,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:10:21,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:10:21,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:10:21,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:10:21,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:10:21,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:10:21,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:10:21,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:10:21,781 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:10:21,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:10:21,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:10:21,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:10:21,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:10:21,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:10:21,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:10:21,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:10:21,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:10:21,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:10:21,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:10:21,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:10:21,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:10:21,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:10:21,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:10:21,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:10:21,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:10:21,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:10:21,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:10:21,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:10:21,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:10:21,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:10:21,786 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:10:21,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:10:21,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:10:21,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:10:21,786 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_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 806c78936017d752a8835e8cd9fbe8a1f06095f8d4eacbf3053870dd4f98f68e [2021-12-06 18:10:21,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:10:21,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:10:21,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:10:21,999 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:10:22,000 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:10:22,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-acceleration/const_1-2.c [2021-12-06 18:10:22,051 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/data/f99a0b5b7/b2eb93cab2bd4e1aa078d6c70a4ba1c2/FLAG347524954 [2021-12-06 18:10:22,438 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:10:22,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/sv-benchmarks/c/loop-acceleration/const_1-2.c [2021-12-06 18:10:22,443 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/data/f99a0b5b7/b2eb93cab2bd4e1aa078d6c70a4ba1c2/FLAG347524954 [2021-12-06 18:10:22,452 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/data/f99a0b5b7/b2eb93cab2bd4e1aa078d6c70a4ba1c2 [2021-12-06 18:10:22,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:10:22,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:10:22,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:10:22,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:10:22,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:10:22,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e4f903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22, skipping insertion in model container [2021-12-06 18:10:22,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:10:22,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:10:22,584 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_a11c3528-d240-429b-9486-77e306147048/sv-benchmarks/c/loop-acceleration/const_1-2.c[321,334] [2021-12-06 18:10:22,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:10:22,597 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:10:22,605 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_a11c3528-d240-429b-9486-77e306147048/sv-benchmarks/c/loop-acceleration/const_1-2.c[321,334] [2021-12-06 18:10:22,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:10:22,616 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:10:22,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22 WrapperNode [2021-12-06 18:10:22,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:10:22,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:10:22,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:10:22,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:10:22,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,638 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-06 18:10:22,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:10:22,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:10:22,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:10:22,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:10:22,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:10:22,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:10:22,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:10:22,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:10:22,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (1/1) ... [2021-12-06 18:10:22,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:10:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:22,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:10:22,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:10:22,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:10:22,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:10:22,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:10:22,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:10:22,768 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:10:22,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:10:22,825 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:10:22,829 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:10:22,830 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 18:10:22,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:10:22 BoogieIcfgContainer [2021-12-06 18:10:22,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:10:22,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:10:22,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:10:22,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:10:22,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:10:22" (1/3) ... [2021-12-06 18:10:22,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c5a11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:10:22, skipping insertion in model container [2021-12-06 18:10:22,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:22" (2/3) ... [2021-12-06 18:10:22,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c5a11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:10:22, skipping insertion in model container [2021-12-06 18:10:22,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:10:22" (3/3) ... [2021-12-06 18:10:22,839 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-2.c [2021-12-06 18:10:22,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:10:22,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:10:22,880 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:10:22,887 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 [2021-12-06 18:10:22,887 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:10:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:10:22,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:22,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:10:22,903 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-06 18:10:22,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:22,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613367451] [2021-12-06 18:10:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:22,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:23,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:23,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613367451] [2021-12-06 18:10:23,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613367451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:23,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:23,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:10:23,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221776397] [2021-12-06 18:10:23,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:23,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:10:23,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:10:23,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:10:23,092 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:23,108 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-06 18:10:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:10:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-06 18:10:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:23,119 INFO L225 Difference]: With dead ends: 20 [2021-12-06 18:10:23,119 INFO L226 Difference]: Without dead ends: 8 [2021-12-06 18:10:23,121 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 [2021-12-06 18:10:23,125 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:23,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:10:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-06 18:10:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-06 18:10:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-06 18:10:23,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-06 18:10:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:23,161 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-06 18:10:23,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-06 18:10:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:10:23,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:23,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:23,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:10:23,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:23,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:23,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-06 18:10:23,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:23,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650963757] [2021-12-06 18:10:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:23,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:23,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:23,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650963757] [2021-12-06 18:10:23,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650963757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:23,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100462082] [2021-12-06 18:10:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:23,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:23,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:23,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:10:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:23,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:10:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:23,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:23,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100462082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:23,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:23,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 18:10:23,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164401037] [2021-12-06 18:10:23,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:23,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:10:23,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:23,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:10:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:10:23,346 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2021-12-06 18:10:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:23,381 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-12-06 18:10:23,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:10:23,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 7 [2021-12-06 18:10:23,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:23,382 INFO L225 Difference]: With dead ends: 15 [2021-12-06 18:10:23,382 INFO L226 Difference]: Without dead ends: 11 [2021-12-06 18:10:23,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:10:23,384 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 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 [2021-12-06 18:10:23,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:10:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-06 18:10:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-06 18:10:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-12-06 18:10:23,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-12-06 18:10:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:23,389 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-12-06 18:10:23,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2021-12-06 18:10:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-12-06 18:10:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:10:23,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:23,390 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:23,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:10:23,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:23,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2021-12-06 18:10:23,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:23,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056671134] [2021-12-06 18:10:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:23,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:23,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:23,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056671134] [2021-12-06 18:10:23,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056671134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:23,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498175474] [2021-12-06 18:10:23,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:10:23,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:23,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:23,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:23,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:10:23,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:10:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:10:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:23,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:23,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498175474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:23,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:23,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-06 18:10:23,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008398795] [2021-12-06 18:10:23,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:23,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:10:23,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:10:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:10:23,970 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:24,222 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-12-06 18:10:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:10:24,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:10:24,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:24,223 INFO L225 Difference]: With dead ends: 21 [2021-12-06 18:10:24,224 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 18:10:24,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:10:24,225 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:24,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:10:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 18:10:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 18:10:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 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) [2021-12-06 18:10:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-12-06 18:10:24,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2021-12-06 18:10:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:24,229 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-12-06 18:10:24,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-12-06 18:10:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:10:24,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:24,230 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:24,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:10:24,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:24,432 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2021-12-06 18:10:24,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:24,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104148642] [2021-12-06 18:10:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:24,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:24,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104148642] [2021-12-06 18:10:24,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104148642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343696190] [2021-12-06 18:10:24,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:10:24,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:24,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:24,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:10:24,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:10:24,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:24,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 18:10:24,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:24,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:24,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343696190] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:24,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:24,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-06 18:10:24,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41180637] [2021-12-06 18:10:24,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:24,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:10:24,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:10:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:10:24,930 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:28,723 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-12-06 18:10:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:10:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:10:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:28,724 INFO L225 Difference]: With dead ends: 33 [2021-12-06 18:10:28,724 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 18:10:28,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 18:10:28,725 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:28,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:10:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 18:10:28,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 18:10:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 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) [2021-12-06 18:10:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-12-06 18:10:28,730 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2021-12-06 18:10:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:28,730 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-12-06 18:10:28,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-12-06 18:10:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:10:28,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:28,731 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:28,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:10:28,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:28,933 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:28,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times [2021-12-06 18:10:28,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:28,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824934301] [2021-12-06 18:10:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:28,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:29,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:29,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824934301] [2021-12-06 18:10:29,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824934301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478045367] [2021-12-06 18:10:29,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:10:29,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:29,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:29,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:29,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:10:29,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:10:29,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:29,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 18:10:29,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:29,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:30,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478045367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:30,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:30,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-06 18:10:30,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176909093] [2021-12-06 18:10:30,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:30,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:10:30,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:10:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:10:30,218 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:01,682 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-12-06 18:12:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:12:01,683 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 18:12:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:01,684 INFO L225 Difference]: With dead ends: 57 [2021-12-06 18:12:01,684 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 18:12:01,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 92.2s TimeCoverageRelationStatistics Valid=1748, Invalid=3222, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 18:12:01,686 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:01,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:12:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 18:12:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 18:12:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-12-06 18:12:01,693 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 28 [2021-12-06 18:12:01,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:01,693 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-12-06 18:12:01,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-12-06 18:12:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:12:01,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:01,694 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:01,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:12:01,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:01,896 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 5 times [2021-12-06 18:12:01,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:01,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381594601] [2021-12-06 18:12:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:01,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:02,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:02,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381594601] [2021-12-06 18:12:02,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381594601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:02,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852982615] [2021-12-06 18:12:02,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:12:02,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:02,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:02,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:02,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11c3528-d240-429b-9486-77e306147048/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:12:48,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-06 18:12:48,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:12:48,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 18:12:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:48,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:51,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852982615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:12:51,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:12:51,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-06 18:12:51,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677015453] [2021-12-06 18:12:51,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:12:51,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 18:12:51,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 18:12:51,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2494, Invalid=6818, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 18:12:51,505 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,073 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ 42 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 1024) (< (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 1024) (< (mod (+ 23 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 16 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 32 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 28) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 37) 4294967296) 1024) (< (mod (+ 31 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 21 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 22 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 41 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 44 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 34) 4294967296) 1024) (< (mod (+ 35 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 1024) (< (mod (+ 40 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 29 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 38) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 1024) (< (mod (+ 19 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 39) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 1024) (< (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 33) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 1024) (< (mod (+ 14 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 27) 4294967296) 1024) (< (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 43) 4294967296) 1024) (< (mod (+ 46 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 1024) (< (mod (+ 30 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 45) 4294967296) 1024) (< (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 36) 4294967296) 1024)) is different from false [2021-12-06 18:16:04,792 WARN L227 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 174 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)