./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0675521d022a764ecdc1621f141761ef94d4be70 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:02:17,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:02:17,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:02:17,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:02:17,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:02:17,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:02:17,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:02:17,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:02:17,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:02:17,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:02:17,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:02:17,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:02:17,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:02:17,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:02:17,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:02:17,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:02:17,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:02:17,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:02:17,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:02:17,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:02:17,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:02:17,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:02:17,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:02:17,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:02:17,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:02:17,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:02:17,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:02:17,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:02:17,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:02:17,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:02:17,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:02:17,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:02:17,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:02:17,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:02:17,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:02:17,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:02:17,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:02:17,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:02:17,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:02:17,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:02:17,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:02:17,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:02:17,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:02:17,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:02:17,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:02:17,882 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:02:17,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:02:17,882 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:02:17,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:02:17,883 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:02:17,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:02:17,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:02:17,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:02:17,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:02:17,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:02:17,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:02:17,884 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:02:17,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:02:17,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:02:17,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:02:17,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:02:17,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:02:17,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:02:17,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:02:17,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:02:17,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:02:17,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:02:17,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:02:17,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:02:17,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:02:17,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:02:17,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:02:17,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:02:17,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:02:17,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:02:17,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:02:17,889 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:02:17,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:02:17,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:02:17,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:02:17,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:02:17,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0675521d022a764ecdc1621f141761ef94d4be70 [2021-10-16 02:02:18,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:02:18,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:02:18,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:02:18,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:02:18,201 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:02:18,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/eca-rers2012/Problem01_label17.c [2021-10-16 02:02:18,304 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/data/ddc5eefad/c506f517c1854c608900b328566d6590/FLAG918906a47 [2021-10-16 02:02:18,912 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:02:18,916 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/sv-benchmarks/c/eca-rers2012/Problem01_label17.c [2021-10-16 02:02:18,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/data/ddc5eefad/c506f517c1854c608900b328566d6590/FLAG918906a47 [2021-10-16 02:02:19,123 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/data/ddc5eefad/c506f517c1854c608900b328566d6590 [2021-10-16 02:02:19,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:02:19,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:02:19,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:02:19,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:02:19,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:02:19,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:19,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a8c358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19, skipping insertion in model container [2021-10-16 02:02:19,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:19,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:02:19,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:02:19,653 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/sv-benchmarks/c/eca-rers2012/Problem01_label17.c[19973,19986] [2021-10-16 02:02:19,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:02:19,701 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:02:19,831 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/sv-benchmarks/c/eca-rers2012/Problem01_label17.c[19973,19986] [2021-10-16 02:02:19,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:02:19,860 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:02:19,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19 WrapperNode [2021-10-16 02:02:19,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:02:19,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:02:19,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:02:19,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:02:19,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:19,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:19,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:02:19,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:02:19,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:02:19,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:02:19,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:19,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:19,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:19,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:20,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:20,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:20,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:20,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:02:20,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:02:20,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:02:20,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:02:20,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (1/1) ... [2021-10-16 02:02:20,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:02:20,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:02:20,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:02:20,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:02:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:02:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:02:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:02:20,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:02:22,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:02:22,254 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:02:22,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:02:22 BoogieIcfgContainer [2021-10-16 02:02:22,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:02:22,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:02:22,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:02:22,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:02:22,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:02:19" (1/3) ... [2021-10-16 02:02:22,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154288b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:02:22, skipping insertion in model container [2021-10-16 02:02:22,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:02:19" (2/3) ... [2021-10-16 02:02:22,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154288b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:02:22, skipping insertion in model container [2021-10-16 02:02:22,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:02:22" (3/3) ... [2021-10-16 02:02:22,290 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2021-10-16 02:02:22,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:02:22,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:02:22,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:02:22,377 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-16 02:02:22,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:02:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2021-10-16 02:02:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-16 02:02:22,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:22,405 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:22,405 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:22,411 INFO L82 PathProgramCache]: Analyzing trace with hash 379026055, now seen corresponding path program 1 times [2021-10-16 02:02:22,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:22,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952260361] [2021-10-16 02:02:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:22,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:02:22,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:22,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952260361] [2021-10-16 02:02:22,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952260361] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:22,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:22,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:02:22,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78842773] [2021-10-16 02:02:22,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:22,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:22,955 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:02:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:23,416 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-16 02:02:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:23,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-16 02:02:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:23,438 INFO L225 Difference]: With dead ends: 224 [2021-10-16 02:02:23,438 INFO L226 Difference]: Without dead ends: 145 [2021-10-16 02:02:23,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-16 02:02:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-16 02:02:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7569444444444444) internal successors, (253), 144 states have internal predecessors, (253), 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) [2021-10-16 02:02:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2021-10-16 02:02:23,527 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2021-10-16 02:02:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:23,529 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2021-10-16 02:02:23,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:02:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2021-10-16 02:02:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-16 02:02:23,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:23,537 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:23,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:02:23,538 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1189482305, now seen corresponding path program 1 times [2021-10-16 02:02:23,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:23,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025954202] [2021-10-16 02:02:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:23,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:02:23,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:23,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025954202] [2021-10-16 02:02:23,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025954202] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:23,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:23,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:02:23,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101314326] [2021-10-16 02:02:23,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:23,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:23,756 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2021-10-16 02:02:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:24,167 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2021-10-16 02:02:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 75 [2021-10-16 02:02:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:24,171 INFO L225 Difference]: With dead ends: 431 [2021-10-16 02:02:24,171 INFO L226 Difference]: Without dead ends: 287 [2021-10-16 02:02:24,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-16 02:02:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-16 02:02:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.632867132867133) internal successors, (467), 286 states have internal predecessors, (467), 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) [2021-10-16 02:02:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-16 02:02:24,206 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 75 [2021-10-16 02:02:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:24,207 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-16 02:02:24,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2021-10-16 02:02:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-16 02:02:24,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-16 02:02:24,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:24,211 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:24,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:02:24,212 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1933825035, now seen corresponding path program 1 times [2021-10-16 02:02:24,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:24,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036633085] [2021-10-16 02:02:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:24,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:02:24,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:24,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036633085] [2021-10-16 02:02:24,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036633085] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:24,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:24,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:02:24,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097326131] [2021-10-16 02:02:24,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:24,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:24,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:24,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:24,363 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-16 02:02:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:24,757 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-16 02:02:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 105 [2021-10-16 02:02:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:24,761 INFO L225 Difference]: With dead ends: 715 [2021-10-16 02:02:24,762 INFO L226 Difference]: Without dead ends: 429 [2021-10-16 02:02:24,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-16 02:02:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-16 02:02:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6442577030812324) internal successors, (587), 357 states have internal predecessors, (587), 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) [2021-10-16 02:02:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-16 02:02:24,786 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-16 02:02:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:24,788 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-16 02:02:24,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-16 02:02:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-16 02:02:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-16 02:02:24,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:24,799 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:24,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:02:24,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:24,800 INFO L82 PathProgramCache]: Analyzing trace with hash 218746559, now seen corresponding path program 1 times [2021-10-16 02:02:24,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:24,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393125868] [2021-10-16 02:02:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:24,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-16 02:02:24,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:24,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393125868] [2021-10-16 02:02:24,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393125868] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:24,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:24,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:02:24,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474530557] [2021-10-16 02:02:24,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:24,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:24,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:24,878 INFO L87 Difference]: Start difference. First operand 358 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-16 02:02:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:25,199 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-16 02:02:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 109 [2021-10-16 02:02:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:25,203 INFO L225 Difference]: With dead ends: 715 [2021-10-16 02:02:25,203 INFO L226 Difference]: Without dead ends: 358 [2021-10-16 02:02:25,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-16 02:02:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-16 02:02:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 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) [2021-10-16 02:02:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-16 02:02:25,219 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-16 02:02:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:25,220 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-16 02:02:25,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-16 02:02:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-16 02:02:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-16 02:02:25,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:25,223 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:25,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:02:25,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash 674880247, now seen corresponding path program 1 times [2021-10-16 02:02:25,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:25,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214026028] [2021-10-16 02:02:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:25,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-16 02:02:25,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:25,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214026028] [2021-10-16 02:02:25,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214026028] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:25,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:25,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:02:25,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433140125] [2021-10-16 02:02:25,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:25,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:25,306 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 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) [2021-10-16 02:02:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:25,684 INFO L93 Difference]: Finished difference Result 857 states and 1369 transitions. [2021-10-16 02:02:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 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 113 [2021-10-16 02:02:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:25,695 INFO L225 Difference]: With dead ends: 857 [2021-10-16 02:02:25,708 INFO L226 Difference]: Without dead ends: 500 [2021-10-16 02:02:25,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-16 02:02:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-16 02:02:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.5210420841683367) internal successors, (759), 499 states have internal predecessors, (759), 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) [2021-10-16 02:02:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2021-10-16 02:02:25,747 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 113 [2021-10-16 02:02:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:25,748 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2021-10-16 02:02:25,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 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) [2021-10-16 02:02:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2021-10-16 02:02:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-16 02:02:25,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:25,765 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:25,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:02:25,765 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:25,766 INFO L82 PathProgramCache]: Analyzing trace with hash -692381003, now seen corresponding path program 1 times [2021-10-16 02:02:25,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:25,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837779616] [2021-10-16 02:02:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:25,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-16 02:02:25,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:25,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837779616] [2021-10-16 02:02:25,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837779616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:25,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:25,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:02:25,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857538909] [2021-10-16 02:02:25,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:25,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:25,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:25,866 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-16 02:02:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:26,269 INFO L93 Difference]: Finished difference Result 1354 states and 2016 transitions. [2021-10-16 02:02:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 122 [2021-10-16 02:02:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:26,275 INFO L225 Difference]: With dead ends: 1354 [2021-10-16 02:02:26,275 INFO L226 Difference]: Without dead ends: 855 [2021-10-16 02:02:26,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-16 02:02:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-16 02:02:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.4804992199687987) internal successors, (949), 641 states have internal predecessors, (949), 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) [2021-10-16 02:02:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-16 02:02:26,307 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 122 [2021-10-16 02:02:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-16 02:02:26,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-16 02:02:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-16 02:02:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-16 02:02:26,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:26,313 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:26,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:02:26,314 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:26,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:26,314 INFO L82 PathProgramCache]: Analyzing trace with hash 240375483, now seen corresponding path program 1 times [2021-10-16 02:02:26,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:26,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840036342] [2021-10-16 02:02:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:26,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-16 02:02:26,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:26,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840036342] [2021-10-16 02:02:26,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840036342] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:26,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:26,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:02:26,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547596360] [2021-10-16 02:02:26,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:26,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:26,432 INFO L87 Difference]: Start difference. First operand 642 states and 949 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 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) [2021-10-16 02:02:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:26,770 INFO L93 Difference]: Finished difference Result 1354 states and 2010 transitions. [2021-10-16 02:02:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 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) Word has length 138 [2021-10-16 02:02:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:26,775 INFO L225 Difference]: With dead ends: 1354 [2021-10-16 02:02:26,776 INFO L226 Difference]: Without dead ends: 713 [2021-10-16 02:02:26,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-16 02:02:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-10-16 02:02:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.4578651685393258) internal successors, (1038), 712 states have internal predecessors, (1038), 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) [2021-10-16 02:02:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1038 transitions. [2021-10-16 02:02:26,799 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1038 transitions. Word has length 138 [2021-10-16 02:02:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:26,799 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1038 transitions. [2021-10-16 02:02:26,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 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) [2021-10-16 02:02:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1038 transitions. [2021-10-16 02:02:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-16 02:02:26,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:26,803 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:26,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:02:26,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:26,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1229086565, now seen corresponding path program 1 times [2021-10-16 02:02:26,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:26,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655363216] [2021-10-16 02:02:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:26,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:02:26,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:26,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655363216] [2021-10-16 02:02:26,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655363216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:26,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:26,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:02:26,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661850853] [2021-10-16 02:02:26,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:02:26,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:02:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:02:26,894 INFO L87 Difference]: Start difference. First operand 713 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-10-16 02:02:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:27,429 INFO L93 Difference]: Finished difference Result 1780 states and 2557 transitions. [2021-10-16 02:02:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:02:27,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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 154 [2021-10-16 02:02:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:27,437 INFO L225 Difference]: With dead ends: 1780 [2021-10-16 02:02:27,437 INFO L226 Difference]: Without dead ends: 997 [2021-10-16 02:02:27,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:02:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-16 02:02:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-16 02:02:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.2359437751004017) internal successors, (1231), 996 states have internal predecessors, (1231), 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) [2021-10-16 02:02:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1231 transitions. [2021-10-16 02:02:27,472 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1231 transitions. Word has length 154 [2021-10-16 02:02:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:27,473 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1231 transitions. [2021-10-16 02:02:27,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-10-16 02:02:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1231 transitions. [2021-10-16 02:02:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-16 02:02:27,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:27,478 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:27,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:02:27,478 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2145597240, now seen corresponding path program 1 times [2021-10-16 02:02:27,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:27,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161712375] [2021-10-16 02:02:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:27,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 02:02:27,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:27,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161712375] [2021-10-16 02:02:27,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161712375] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:27,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:27,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:02:27,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480188697] [2021-10-16 02:02:27,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:02:27,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:02:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:02:27,612 INFO L87 Difference]: Start difference. First operand 997 states and 1231 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:02:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:28,117 INFO L93 Difference]: Finished difference Result 2206 states and 2715 transitions. [2021-10-16 02:02:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:02:28,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-10-16 02:02:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:28,131 INFO L225 Difference]: With dead ends: 2206 [2021-10-16 02:02:28,131 INFO L226 Difference]: Without dead ends: 1210 [2021-10-16 02:02:28,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:02:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-16 02:02:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2021-10-16 02:02:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1927710843373494) internal successors, (1188), 996 states have internal predecessors, (1188), 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) [2021-10-16 02:02:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1188 transitions. [2021-10-16 02:02:28,162 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1188 transitions. Word has length 171 [2021-10-16 02:02:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:28,163 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1188 transitions. [2021-10-16 02:02:28,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:02:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1188 transitions. [2021-10-16 02:02:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-16 02:02:28,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:28,167 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:28,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:02:28,167 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1532629065, now seen corresponding path program 1 times [2021-10-16 02:02:28,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:28,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805932138] [2021-10-16 02:02:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:28,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:02:28,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:28,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805932138] [2021-10-16 02:02:28,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805932138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:02:28,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692955858] [2021-10-16 02:02:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:28,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:02:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:02:28,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:02:28,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:02:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:28,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:02:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:02:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-16 02:02:29,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:02:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-16 02:02:30,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692955858] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:30,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:02:30,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2021-10-16 02:02:30,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021002374] [2021-10-16 02:02:30,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:30,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:30,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:02:30,063 INFO L87 Difference]: Start difference. First operand 997 states and 1188 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2021-10-16 02:02:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:30,336 INFO L93 Difference]: Finished difference Result 1709 states and 2015 transitions. [2021-10-16 02:02:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 175 [2021-10-16 02:02:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:30,347 INFO L225 Difference]: With dead ends: 1709 [2021-10-16 02:02:30,348 INFO L226 Difference]: Without dead ends: 1707 [2021-10-16 02:02:30,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:02:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-16 02:02:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1565. [2021-10-16 02:02:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1564 states have (on average 1.1796675191815857) internal successors, (1845), 1564 states have internal predecessors, (1845), 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) [2021-10-16 02:02:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1845 transitions. [2021-10-16 02:02:30,402 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1845 transitions. Word has length 175 [2021-10-16 02:02:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:30,403 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1845 transitions. [2021-10-16 02:02:30,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2021-10-16 02:02:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1845 transitions. [2021-10-16 02:02:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-10-16 02:02:30,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:30,409 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:30,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:02:30,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-16 02:02:30,637 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:30,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1287882040, now seen corresponding path program 1 times [2021-10-16 02:02:30,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:30,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069246474] [2021-10-16 02:02:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:30,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-10-16 02:02:30,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:30,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069246474] [2021-10-16 02:02:30,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069246474] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:30,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:30,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:02:30,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207430797] [2021-10-16 02:02:30,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:02:30,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:30,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:02:30,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:02:30,738 INFO L87 Difference]: Start difference. First operand 1565 states and 1845 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-10-16 02:02:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:31,217 INFO L93 Difference]: Finished difference Result 3200 states and 3779 transitions. [2021-10-16 02:02:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:02:31,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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 202 [2021-10-16 02:02:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:31,229 INFO L225 Difference]: With dead ends: 3200 [2021-10-16 02:02:31,230 INFO L226 Difference]: Without dead ends: 1636 [2021-10-16 02:02:31,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:02:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-16 02:02:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2021-10-16 02:02:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 1.165137614678899) internal successors, (1905), 1635 states have internal predecessors, (1905), 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) [2021-10-16 02:02:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1905 transitions. [2021-10-16 02:02:31,287 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1905 transitions. Word has length 202 [2021-10-16 02:02:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:31,288 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 1905 transitions. [2021-10-16 02:02:31,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-10-16 02:02:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1905 transitions. [2021-10-16 02:02:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-10-16 02:02:31,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:31,294 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:31,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 02:02:31,294 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash 853603705, now seen corresponding path program 1 times [2021-10-16 02:02:31,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:31,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797110085] [2021-10-16 02:02:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:31,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-16 02:02:31,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:31,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797110085] [2021-10-16 02:02:31,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797110085] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:31,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:31,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:02:31,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651125154] [2021-10-16 02:02:31,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:31,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:31,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:31,407 INFO L87 Difference]: Start difference. First operand 1636 states and 1905 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-10-16 02:02:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:31,742 INFO L93 Difference]: Finished difference Result 3555 states and 4142 transitions. [2021-10-16 02:02:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:31,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 220 [2021-10-16 02:02:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:31,755 INFO L225 Difference]: With dead ends: 3555 [2021-10-16 02:02:31,755 INFO L226 Difference]: Without dead ends: 1920 [2021-10-16 02:02:31,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-10-16 02:02:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1849. [2021-10-16 02:02:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 1.1466450216450217) internal successors, (2119), 1848 states have internal predecessors, (2119), 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) [2021-10-16 02:02:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2119 transitions. [2021-10-16 02:02:31,815 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2119 transitions. Word has length 220 [2021-10-16 02:02:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:31,816 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2119 transitions. [2021-10-16 02:02:31,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-10-16 02:02:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2119 transitions. [2021-10-16 02:02:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-16 02:02:31,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:31,823 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:31,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 02:02:31,824 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2121153666, now seen corresponding path program 1 times [2021-10-16 02:02:31,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:31,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156775256] [2021-10-16 02:02:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:31,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-16 02:02:32,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:32,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156775256] [2021-10-16 02:02:32,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156775256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:32,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:02:32,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:02:32,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496658520] [2021-10-16 02:02:32,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:32,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:32,044 INFO L87 Difference]: Start difference. First operand 1849 states and 2119 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-10-16 02:02:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:32,364 INFO L93 Difference]: Finished difference Result 3981 states and 4546 transitions. [2021-10-16 02:02:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 242 [2021-10-16 02:02:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:32,377 INFO L225 Difference]: With dead ends: 3981 [2021-10-16 02:02:32,377 INFO L226 Difference]: Without dead ends: 1849 [2021-10-16 02:02:32,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:02:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-10-16 02:02:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1210. [2021-10-16 02:02:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 1.1339950372208436) internal successors, (1371), 1209 states have internal predecessors, (1371), 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) [2021-10-16 02:02:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1371 transitions. [2021-10-16 02:02:32,430 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1371 transitions. Word has length 242 [2021-10-16 02:02:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:32,431 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1371 transitions. [2021-10-16 02:02:32,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-10-16 02:02:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1371 transitions. [2021-10-16 02:02:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-16 02:02:32,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:32,438 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:32,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-16 02:02:32,439 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1886816303, now seen corresponding path program 1 times [2021-10-16 02:02:32,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:32,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744840896] [2021-10-16 02:02:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:32,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-16 02:02:32,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:32,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744840896] [2021-10-16 02:02:32,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744840896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:02:32,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544809612] [2021-10-16 02:02:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:32,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:02:32,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:02:32,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:02:32,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:02:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:33,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:02:33,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:02:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-16 02:02:33,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:02:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-16 02:02:34,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544809612] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:34,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:02:34,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:02:34,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902733833] [2021-10-16 02:02:34,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:34,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:34,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:02:34,373 INFO L87 Difference]: Start difference. First operand 1210 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-10-16 02:02:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:34,685 INFO L93 Difference]: Finished difference Result 2348 states and 2667 transitions. [2021-10-16 02:02:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:34,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 255 [2021-10-16 02:02:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:34,693 INFO L225 Difference]: With dead ends: 2348 [2021-10-16 02:02:34,693 INFO L226 Difference]: Without dead ends: 1210 [2021-10-16 02:02:34,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:02:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-16 02:02:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2021-10-16 02:02:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.1246485473289598) internal successors, (1200), 1067 states have internal predecessors, (1200), 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) [2021-10-16 02:02:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1200 transitions. [2021-10-16 02:02:34,732 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1200 transitions. Word has length 255 [2021-10-16 02:02:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:34,733 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1200 transitions. [2021-10-16 02:02:34,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-10-16 02:02:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1200 transitions. [2021-10-16 02:02:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-10-16 02:02:34,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:02:34,740 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:02:34,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:02:34,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-16 02:02:34,961 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:02:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:02:34,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1810003544, now seen corresponding path program 1 times [2021-10-16 02:02:34,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:02:34,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458214943] [2021-10-16 02:02:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:34,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:02:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 342 proven. 110 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-16 02:02:35,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:02:35,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458214943] [2021-10-16 02:02:35,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458214943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:02:35,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700674657] [2021-10-16 02:02:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:02:35,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:02:35,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:02:35,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:02:35,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:02:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:02:35,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:02:35,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:02:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-16 02:02:36,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:02:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-16 02:02:37,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700674657] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:02:37,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:02:37,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2021-10-16 02:02:37,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554863084] [2021-10-16 02:02:37,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:02:37,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:02:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:02:37,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:02:37,194 INFO L87 Difference]: Start difference. First operand 1068 states and 1200 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2021-10-16 02:02:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:02:37,504 INFO L93 Difference]: Finished difference Result 2062 states and 2324 transitions. [2021-10-16 02:02:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:02:37,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 263 [2021-10-16 02:02:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:02:37,506 INFO L225 Difference]: With dead ends: 2062 [2021-10-16 02:02:37,507 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:02:37,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:02:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:02:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:02:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:02:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:02:37,510 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2021-10-16 02:02:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:02:37,511 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:02:37,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2021-10-16 02:02:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:02:37,512 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:02:37,515 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:02:37,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:02:37,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:02:37,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:02:37,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:02:37,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:02:37,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:02:38,453 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-16 02:02:38,453 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-16 02:02:38,453 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L533-1(lines 40 585) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L534(line 534) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-16 02:02:38,454 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-16 02:02:38,456 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-16 02:02:38,456 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-16 02:02:38,456 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-16 02:02:38,457 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-16 02:02:38,457 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-16 02:02:38,457 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-16 02:02:38,457 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-16 02:02:38,457 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-16 02:02:38,457 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-16 02:02:38,458 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-16 02:02:38,458 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-16 02:02:38,458 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-16 02:02:38,458 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-16 02:02:38,458 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-16 02:02:38,459 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-16 02:02:38,459 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-16 02:02:38,459 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-16 02:02:38,459 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-16 02:02:38,459 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-16 02:02:38,460 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-16 02:02:38,460 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-16 02:02:38,460 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-16 02:02:38,460 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-16 02:02:38,460 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-16 02:02:38,461 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-16 02:02:38,461 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-16 02:02:38,461 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:02:38,461 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-16 02:02:38,461 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-16 02:02:38,462 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-16 02:02:38,462 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse9 (= ~a20~0 1))) (let ((.cse3 (<= 15 ~a8~0)) (.cse0 (not .cse9)) (.cse4 (<= ~a8~0 13)) (.cse7 (<= ~a16~0 4)) (.cse5 (<= ~a16~0 5)) (.cse8 (<= ~a17~0 0)) (.cse6 (<= ~a7~0 0)) (.cse1 (= ~a21~0 1)) (.cse2 (= ~a17~0 1))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse2 .cse5) (and (<= 6 ~a16~0) .cse1 .cse2 .cse3) (and .cse6 .cse4 .cse1 .cse7) (and .cse8 .cse1 .cse3) (and .cse4 .cse8 .cse9) (and .cse1 .cse2 .cse7 .cse9) (and .cse0 .cse4 .cse1 .cse7) (and .cse8 .cse1 .cse5) (and .cse8 .cse1 .cse9) (and .cse6 .cse1 .cse2 .cse9)))) [2021-10-16 02:02:38,462 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-16 02:02:38,463 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-16 02:02:38,463 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-16 02:02:38,463 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-16 02:02:38,463 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-16 02:02:38,463 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-16 02:02:38,464 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-16 02:02:38,464 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:02:38,464 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-16 02:02:38,464 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-16 02:02:38,464 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-16 02:02:38,465 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-16 02:02:38,465 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-16 02:02:38,465 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-16 02:02:38,465 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-16 02:02:38,465 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-16 02:02:38,466 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-16 02:02:38,466 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-16 02:02:38,466 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-16 02:02:38,466 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-16 02:02:38,466 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-16 02:02:38,467 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-16 02:02:38,467 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-16 02:02:38,467 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse9 (= ~a20~0 1))) (let ((.cse3 (<= 15 ~a8~0)) (.cse0 (not .cse9)) (.cse4 (<= ~a8~0 13)) (.cse7 (<= ~a16~0 4)) (.cse5 (<= ~a16~0 5)) (.cse8 (<= ~a17~0 0)) (.cse6 (<= ~a7~0 0)) (.cse1 (= ~a21~0 1)) (.cse2 (= ~a17~0 1))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse2 .cse5) (and (<= 6 ~a16~0) .cse1 .cse2 .cse3) (and .cse6 .cse4 .cse1 .cse7) (and .cse8 .cse1 .cse3) (and .cse4 .cse8 .cse9) (and .cse1 .cse2 .cse7 .cse9) (and .cse0 .cse4 .cse1 .cse7) (and .cse8 .cse1 .cse5) (and .cse8 .cse1 .cse9) (and .cse6 .cse1 .cse2 .cse9)))) [2021-10-16 02:02:38,467 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-16 02:02:38,468 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 534) no Hoare annotation was computed. [2021-10-16 02:02:38,468 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-16 02:02:38,468 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-16 02:02:38,468 INFO L857 garLoopResultBuilder]: For program point L530-1(lines 40 585) no Hoare annotation was computed. [2021-10-16 02:02:38,468 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-16 02:02:38,469 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-16 02:02:38,469 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-16 02:02:38,469 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-16 02:02:38,473 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:02:38,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:02:38 BoogieIcfgContainer [2021-10-16 02:02:38,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:02:38,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:02:38,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:02:38,496 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:02:38,497 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:02:22" (3/4) ... [2021-10-16 02:02:38,501 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:02:38,530 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-16 02:02:38,532 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-16 02:02:38,534 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-16 02:02:38,536 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:02:38,686 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:02:38,686 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:02:38,688 INFO L168 Benchmark]: Toolchain (without parser) took 19551.20 ms. Allocated memory was 98.6 MB in the beginning and 224.4 MB in the end (delta: 125.8 MB). Free memory was 63.0 MB in the beginning and 133.2 MB in the end (delta: -70.1 MB). Peak memory consumption was 55.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:02:38,689 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 98.6 MB. Free memory was 69.2 MB in the beginning and 69.2 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:02:38,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 725.65 ms. Allocated memory is still 98.6 MB. Free memory was 62.9 MB in the beginning and 58.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:02:38,690 INFO L168 Benchmark]: Boogie Procedure Inliner took 109.44 ms. Allocated memory is still 98.6 MB. Free memory was 58.4 MB in the beginning and 52.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:02:38,690 INFO L168 Benchmark]: Boogie Preprocessor took 87.77 ms. Allocated memory is still 98.6 MB. Free memory was 52.9 MB in the beginning and 48.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:02:38,691 INFO L168 Benchmark]: RCFGBuilder took 2192.31 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 48.7 MB in the beginning and 48.8 MB in the end (delta: -32.4 kB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:02:38,691 INFO L168 Benchmark]: TraceAbstraction took 16212.87 ms. Allocated memory was 123.7 MB in the beginning and 224.4 MB in the end (delta: 100.7 MB). Free memory was 92.6 MB in the beginning and 148.9 MB in the end (delta: -56.3 MB). Peak memory consumption was 129.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:02:38,692 INFO L168 Benchmark]: Witness Printer took 190.88 ms. Allocated memory is still 224.4 MB. Free memory was 148.9 MB in the beginning and 133.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:02:38,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 98.6 MB. Free memory was 69.2 MB in the beginning and 69.2 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 725.65 ms. Allocated memory is still 98.6 MB. Free memory was 62.9 MB in the beginning and 58.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 109.44 ms. Allocated memory is still 98.6 MB. Free memory was 58.4 MB in the beginning and 52.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 87.77 ms. Allocated memory is still 98.6 MB. Free memory was 52.9 MB in the beginning and 48.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2192.31 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 48.7 MB in the beginning and 48.8 MB in the end (delta: -32.4 kB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16212.87 ms. Allocated memory was 123.7 MB in the beginning and 224.4 MB in the end (delta: 100.7 MB). Free memory was 92.6 MB in the beginning and 148.9 MB in the end (delta: -56.3 MB). Peak memory consumption was 129.2 MB. Max. memory is 16.1 GB. * Witness Printer took 190.88 ms. Allocated memory is still 224.4 MB. Free memory was 148.9 MB in the beginning and 133.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 534]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16106.9ms, OverallIterations: 15, TraceHistogramMax: 7, EmptinessCheckTime: 94.2ms, AutomataDifference: 6004.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 712.0ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 674 SDtfs, 904 SDslu, 65 SDs, 0 SdLazy, 3405 SolverSat, 842 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4053.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1428 GetRequests, 1395 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 202.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=12, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 540.1ms AutomataMinimizationTime, 15 MinimizatonAttempts, 1491 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 263 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3288 FormulaSimplificationTreeSizeReduction, 108.2ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 298 FormulaSimplificationTreeSizeReductionInter, 596.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 299.1ms SsaConstructionTime, 956.3ms SatisfiabilityAnalysisTime, 5896.4ms InterpolantComputationTime, 3108 NumberOfCodeBlocks, 3108 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 3780 ConstructedInterpolants, 0 QuantifiedInterpolants, 13074 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 21 InterpolantComputations, 18 PerfectInterpolantSequences, 4329/4634 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((((!(a20 == 1) && a21 == 1) && a17 == 1) && 15 <= a8) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || (((6 <= a16 && a21 == 1) && a17 == 1) && 15 <= a8)) || (((a7 <= 0 && a8 <= 13) && a21 == 1) && a16 <= 4)) || ((a17 <= 0 && a21 == 1) && 15 <= a8)) || ((a8 <= 13 && a17 <= 0) && a20 == 1)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((!(a20 == 1) && a8 <= 13) && a21 == 1) && a16 <= 4)) || ((a17 <= 0 && a21 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((((!(a20 == 1) && a21 == 1) && a17 == 1) && 15 <= a8) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || (((6 <= a16 && a21 == 1) && a17 == 1) && 15 <= a8)) || (((a7 <= 0 && a8 <= 13) && a21 == 1) && a16 <= 4)) || ((a17 <= 0 && a21 == 1) && 15 <= a8)) || ((a8 <= 13 && a17 <= 0) && a20 == 1)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((!(a20 == 1) && a8 <= 13) && a21 == 1) && a16 <= 4)) || ((a17 <= 0 && a21 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:02:38,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d7979-3841-4bde-ad63-986d6f98dc09/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...