./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE --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 f0697d9089c8f644e106fd291328f66f211f5f9eb49bfcc0a5bab680b0bbbbc1 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:02:40,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:02:40,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:02:40,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:02:40,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:02:40,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:02:40,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:02:40,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:02:40,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:02:40,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:02:40,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:02:40,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:02:40,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:02:40,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:02:40,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:02:40,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:02:40,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:02:40,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:02:40,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:02:40,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:02:40,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:02:40,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:02:40,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:02:40,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:02:40,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:02:40,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:02:40,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:02:40,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:02:40,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:02:40,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:02:40,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:02:40,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:02:40,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:02:40,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:02:40,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:02:40,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:02:40,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:02:40,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:02:40,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:02:40,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:02:40,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:02:40,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:02:40,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:02:40,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:02:40,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:02:40,939 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:02:40,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:02:40,939 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:02:40,940 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:02:40,940 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:02:40,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:02:40,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:02:40,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:02:40,947 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:02:40,947 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:02:40,947 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:02:40,947 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:02:40,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:02:40,948 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:02:40,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:02:40,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:02:40,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:02:40,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:02:40,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:02:40,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:02:40,949 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:02:40,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:02:40,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:02:40,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:02:40,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:02:40,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:02:40,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:02:40,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:02:40,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:02:40,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:02:40,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:02:40,951 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:02:40,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:02:40,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:02:40,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:02:40,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:02:40,952 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_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0697d9089c8f644e106fd291328f66f211f5f9eb49bfcc0a5bab680b0bbbbc1 [2021-10-24 10:02:41,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:02:41,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:02:41,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:02:41,264 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:02:41,265 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:02:41,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/eca-rers2012/Problem02_label40.c [2021-10-24 10:02:41,324 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/data/be8aa32d7/daf35ee0ec25427e914945b6a3bfe842/FLAGbfc62ffbf [2021-10-24 10:02:41,877 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:02:41,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/sv-benchmarks/c/eca-rers2012/Problem02_label40.c [2021-10-24 10:02:41,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/data/be8aa32d7/daf35ee0ec25427e914945b6a3bfe842/FLAGbfc62ffbf [2021-10-24 10:02:42,146 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/data/be8aa32d7/daf35ee0ec25427e914945b6a3bfe842 [2021-10-24 10:02:42,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:02:42,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:02:42,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:02:42,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:02:42,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:02:42,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa90dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42, skipping insertion in model container [2021-10-24 10:02:42,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:02:42,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:02:42,579 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_cf5bf400-6283-4375-ab06-68cc44988504/sv-benchmarks/c/eca-rers2012/Problem02_label40.c[15538,15551] [2021-10-24 10:02:42,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:02:42,660 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:02:42,726 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_cf5bf400-6283-4375-ab06-68cc44988504/sv-benchmarks/c/eca-rers2012/Problem02_label40.c[15538,15551] [2021-10-24 10:02:42,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:02:42,763 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:02:42,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42 WrapperNode [2021-10-24 10:02:42,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:02:42,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:02:42,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:02:42,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:02:42,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:02:42,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:02:42,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:02:42,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:02:42,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:02:42,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:02:42,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:02:42,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:02:42,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (1/1) ... [2021-10-24 10:02:42,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:02:43,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:02:43,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:02:43,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:02:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:02:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:02:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:02:43,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:02:44,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:02:44,983 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 10:02:45,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:02:45 BoogieIcfgContainer [2021-10-24 10:02:45,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:02:45,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:02:45,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:02:45,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:02:45,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:02:42" (1/3) ... [2021-10-24 10:02:45,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fcaa61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:02:45, skipping insertion in model container [2021-10-24 10:02:45,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:02:42" (2/3) ... [2021-10-24 10:02:45,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fcaa61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:02:45, skipping insertion in model container [2021-10-24 10:02:45,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:02:45" (3/3) ... [2021-10-24 10:02:45,032 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label40.c [2021-10-24 10:02:45,043 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:02:45,043 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:02:45,115 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:02:45,121 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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 [2021-10-24 10:02:45,121 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:02:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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) [2021-10-24 10:02:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-24 10:02:45,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:45,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:02:45,163 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:45,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1814570708, now seen corresponding path program 1 times [2021-10-24 10:02:45,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:45,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951142703] [2021-10-24 10:02:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:45,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:45,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:45,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951142703] [2021-10-24 10:02:45,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951142703] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:45,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:45,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:02:45,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469124657] [2021-10-24 10:02:45,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:45,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:45,516 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-10-24 10:02:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:45,918 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-10-24 10:02:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2021-10-24 10:02:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:45,940 INFO L225 Difference]: With dead ends: 251 [2021-10-24 10:02:45,940 INFO L226 Difference]: Without dead ends: 163 [2021-10-24 10:02:45,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-24 10:02:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-10-24 10:02:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.808641975308642) internal successors, (293), 162 states have internal predecessors, (293), 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) [2021-10-24 10:02:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 293 transitions. [2021-10-24 10:02:46,026 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 293 transitions. Word has length 80 [2021-10-24 10:02:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:46,028 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 293 transitions. [2021-10-24 10:02:46,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-10-24 10:02:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 293 transitions. [2021-10-24 10:02:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-24 10:02:46,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:46,063 INFO L512 BasicCegarLoop]: trace histogram [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, 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] [2021-10-24 10:02:46,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:02:46,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1153885741, now seen corresponding path program 1 times [2021-10-24 10:02:46,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:46,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722930390] [2021-10-24 10:02:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:46,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:46,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:46,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722930390] [2021-10-24 10:02:46,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722930390] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:46,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:46,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:02:46,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336661907] [2021-10-24 10:02:46,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:46,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:46,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:46,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:46,241 INFO L87 Difference]: Start difference. First operand 163 states and 293 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2021-10-24 10:02:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:46,688 INFO L93 Difference]: Finished difference Result 485 states and 876 transitions. [2021-10-24 10:02:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:46,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 88 [2021-10-24 10:02:46,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:46,692 INFO L225 Difference]: With dead ends: 485 [2021-10-24 10:02:46,692 INFO L226 Difference]: Without dead ends: 323 [2021-10-24 10:02:46,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-24 10:02:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-10-24 10:02:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5031055900621118) internal successors, (484), 322 states have internal predecessors, (484), 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) [2021-10-24 10:02:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 484 transitions. [2021-10-24 10:02:46,714 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 484 transitions. Word has length 88 [2021-10-24 10:02:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:46,714 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 484 transitions. [2021-10-24 10:02:46,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2021-10-24 10:02:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 484 transitions. [2021-10-24 10:02:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-24 10:02:46,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:46,719 INFO L512 BasicCegarLoop]: trace histogram [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, 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] [2021-10-24 10:02:46,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:02:46,719 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1787483967, now seen corresponding path program 1 times [2021-10-24 10:02:46,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:46,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202024512] [2021-10-24 10:02:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:46,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:46,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:46,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202024512] [2021-10-24 10:02:46,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202024512] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:46,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:46,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:02:46,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003388976] [2021-10-24 10:02:46,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:46,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:46,823 INFO L87 Difference]: Start difference. First operand 323 states and 484 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-10-24 10:02:47,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:47,167 INFO L93 Difference]: Finished difference Result 965 states and 1449 transitions. [2021-10-24 10:02:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:47,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2021-10-24 10:02:47,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:47,172 INFO L225 Difference]: With dead ends: 965 [2021-10-24 10:02:47,173 INFO L226 Difference]: Without dead ends: 643 [2021-10-24 10:02:47,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-10-24 10:02:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 563. [2021-10-24 10:02:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.4572953736654803) internal successors, (819), 562 states have internal predecessors, (819), 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) [2021-10-24 10:02:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 819 transitions. [2021-10-24 10:02:47,203 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 819 transitions. Word has length 89 [2021-10-24 10:02:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:47,204 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 819 transitions. [2021-10-24 10:02:47,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-10-24 10:02:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 819 transitions. [2021-10-24 10:02:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-24 10:02:47,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:47,209 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:02:47,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:02:47,209 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1696179608, now seen corresponding path program 1 times [2021-10-24 10:02:47,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:47,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221774067] [2021-10-24 10:02:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:47,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:47,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:47,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221774067] [2021-10-24 10:02:47,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221774067] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:47,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:47,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:02:47,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170433317] [2021-10-24 10:02:47,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:47,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:47,267 INFO L87 Difference]: Start difference. First operand 563 states and 819 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2021-10-24 10:02:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:47,607 INFO L93 Difference]: Finished difference Result 1605 states and 2358 transitions. [2021-10-24 10:02:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 90 [2021-10-24 10:02:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:47,615 INFO L225 Difference]: With dead ends: 1605 [2021-10-24 10:02:47,615 INFO L226 Difference]: Without dead ends: 1043 [2021-10-24 10:02:47,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-10-24 10:02:47,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2021-10-24 10:02:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.3915547024952015) internal successors, (1450), 1042 states have internal predecessors, (1450), 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) [2021-10-24 10:02:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1450 transitions. [2021-10-24 10:02:47,683 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1450 transitions. Word has length 90 [2021-10-24 10:02:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:47,683 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1450 transitions. [2021-10-24 10:02:47,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2021-10-24 10:02:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1450 transitions. [2021-10-24 10:02:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-24 10:02:47,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:47,687 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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] [2021-10-24 10:02:47,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:02:47,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:47,691 INFO L82 PathProgramCache]: Analyzing trace with hash -699184394, now seen corresponding path program 1 times [2021-10-24 10:02:47,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:47,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025193825] [2021-10-24 10:02:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:47,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-24 10:02:47,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:47,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025193825] [2021-10-24 10:02:47,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025193825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:02:47,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235946691] [2021-10-24 10:02:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:47,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:02:47,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:02:47,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:02:47,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:02:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:47,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 10:02:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:02:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 10:02:48,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:02:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 10:02:48,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235946691] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:48,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:02:48,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-10-24 10:02:48,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280899445] [2021-10-24 10:02:48,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:48,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:02:48,629 INFO L87 Difference]: Start difference. First operand 1043 states and 1450 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) [2021-10-24 10:02:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:49,126 INFO L93 Difference]: Finished difference Result 2645 states and 3697 transitions. [2021-10-24 10:02:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:49,127 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 93 [2021-10-24 10:02:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:49,137 INFO L225 Difference]: With dead ends: 2645 [2021-10-24 10:02:49,137 INFO L226 Difference]: Without dead ends: 1523 [2021-10-24 10:02:49,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:02:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-10-24 10:02:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1523. [2021-10-24 10:02:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 1.3515111695137976) internal successors, (2057), 1522 states have internal predecessors, (2057), 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) [2021-10-24 10:02:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2057 transitions. [2021-10-24 10:02:49,181 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2057 transitions. Word has length 93 [2021-10-24 10:02:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:49,182 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 2057 transitions. [2021-10-24 10:02:49,183 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) [2021-10-24 10:02:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2057 transitions. [2021-10-24 10:02:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-24 10:02:49,186 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:49,187 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 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] [2021-10-24 10:02:49,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:02:49,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:02:49,411 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:49,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1651147755, now seen corresponding path program 1 times [2021-10-24 10:02:49,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:49,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326152396] [2021-10-24 10:02:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:49,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-24 10:02:49,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:49,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326152396] [2021-10-24 10:02:49,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326152396] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:49,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:49,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:02:49,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013463599] [2021-10-24 10:02:49,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:49,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:49,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:49,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:49,501 INFO L87 Difference]: Start difference. First operand 1523 states and 2057 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-10-24 10:02:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:49,935 INFO L93 Difference]: Finished difference Result 3445 states and 4740 transitions. [2021-10-24 10:02:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 97 [2021-10-24 10:02:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:49,947 INFO L225 Difference]: With dead ends: 3445 [2021-10-24 10:02:49,947 INFO L226 Difference]: Without dead ends: 1923 [2021-10-24 10:02:49,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-10-24 10:02:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1843. [2021-10-24 10:02:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 1.3165038002171552) internal successors, (2425), 1842 states have internal predecessors, (2425), 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) [2021-10-24 10:02:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2425 transitions. [2021-10-24 10:02:49,997 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2425 transitions. Word has length 97 [2021-10-24 10:02:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:49,997 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 2425 transitions. [2021-10-24 10:02:49,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-10-24 10:02:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2425 transitions. [2021-10-24 10:02:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-24 10:02:50,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:50,001 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:02:50,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 10:02:50,002 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:50,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1105143515, now seen corresponding path program 1 times [2021-10-24 10:02:50,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:50,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607556772] [2021-10-24 10:02:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:50,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:50,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:50,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607556772] [2021-10-24 10:02:50,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607556772] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:50,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:50,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:02:50,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061175661] [2021-10-24 10:02:50,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:50,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:50,056 INFO L87 Difference]: Start difference. First operand 1843 states and 2425 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-10-24 10:02:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:50,415 INFO L93 Difference]: Finished difference Result 4005 states and 5238 transitions. [2021-10-24 10:02:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 [2021-10-24 10:02:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:50,429 INFO L225 Difference]: With dead ends: 4005 [2021-10-24 10:02:50,429 INFO L226 Difference]: Without dead ends: 2163 [2021-10-24 10:02:50,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-10-24 10:02:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2163. [2021-10-24 10:02:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 1.2645698427382053) internal successors, (2734), 2162 states have internal predecessors, (2734), 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) [2021-10-24 10:02:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 2734 transitions. [2021-10-24 10:02:50,487 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 2734 transitions. Word has length 109 [2021-10-24 10:02:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:50,488 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 2734 transitions. [2021-10-24 10:02:50,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-10-24 10:02:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 2734 transitions. [2021-10-24 10:02:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-24 10:02:50,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:50,496 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:02:50,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 10:02:50,497 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1445111342, now seen corresponding path program 1 times [2021-10-24 10:02:50,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:50,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030727764] [2021-10-24 10:02:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:50,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-24 10:02:50,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:50,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030727764] [2021-10-24 10:02:50,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030727764] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:50,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:50,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:02:50,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282423115] [2021-10-24 10:02:50,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:50,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:50,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:50,566 INFO L87 Difference]: Start difference. First operand 2163 states and 2734 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) 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) [2021-10-24 10:02:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:50,935 INFO L93 Difference]: Finished difference Result 4325 states and 5467 transitions. [2021-10-24 10:02:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) 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 118 [2021-10-24 10:02:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:50,948 INFO L225 Difference]: With dead ends: 4325 [2021-10-24 10:02:50,948 INFO L226 Difference]: Without dead ends: 2163 [2021-10-24 10:02:50,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-10-24 10:02:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2163. [2021-10-24 10:02:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 1.2391304347826086) internal successors, (2679), 2162 states have internal predecessors, (2679), 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) [2021-10-24 10:02:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 2679 transitions. [2021-10-24 10:02:51,008 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 2679 transitions. Word has length 118 [2021-10-24 10:02:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:51,009 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 2679 transitions. [2021-10-24 10:02:51,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) 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) [2021-10-24 10:02:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 2679 transitions. [2021-10-24 10:02:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-24 10:02:51,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:51,014 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, 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, 1, 1, 1, 1, 1] [2021-10-24 10:02:51,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 10:02:51,014 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:51,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1806907490, now seen corresponding path program 1 times [2021-10-24 10:02:51,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:51,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070202911] [2021-10-24 10:02:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:51,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-24 10:02:51,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:51,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070202911] [2021-10-24 10:02:51,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070202911] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:51,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:51,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:02:51,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401590449] [2021-10-24 10:02:51,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:51,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:51,082 INFO L87 Difference]: Start difference. First operand 2163 states and 2679 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2021-10-24 10:02:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:51,287 INFO L93 Difference]: Finished difference Result 3925 states and 4897 transitions. [2021-10-24 10:02:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 139 [2021-10-24 10:02:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:51,297 INFO L225 Difference]: With dead ends: 3925 [2021-10-24 10:02:51,298 INFO L226 Difference]: Without dead ends: 1683 [2021-10-24 10:02:51,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-10-24 10:02:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1683. [2021-10-24 10:02:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 1.2045184304399525) internal successors, (2026), 1682 states have internal predecessors, (2026), 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) [2021-10-24 10:02:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 2026 transitions. [2021-10-24 10:02:51,345 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 2026 transitions. Word has length 139 [2021-10-24 10:02:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:51,346 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 2026 transitions. [2021-10-24 10:02:51,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2021-10-24 10:02:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 2026 transitions. [2021-10-24 10:02:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-10-24 10:02:51,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:51,351 INFO L512 BasicCegarLoop]: trace histogram [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, 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] [2021-10-24 10:02:51,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-24 10:02:51,351 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1029744745, now seen corresponding path program 1 times [2021-10-24 10:02:51,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:51,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730766663] [2021-10-24 10:02:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:51,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-24 10:02:51,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:51,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730766663] [2021-10-24 10:02:51,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730766663] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:51,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:51,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:02:51,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877822667] [2021-10-24 10:02:51,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:51,416 INFO L87 Difference]: Start difference. First operand 1683 states and 2026 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2021-10-24 10:02:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:51,769 INFO L93 Difference]: Finished difference Result 3605 states and 4407 transitions. [2021-10-24 10:02:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 152 [2021-10-24 10:02:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:51,781 INFO L225 Difference]: With dead ends: 3605 [2021-10-24 10:02:51,781 INFO L226 Difference]: Without dead ends: 2003 [2021-10-24 10:02:51,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-10-24 10:02:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1523. [2021-10-24 10:02:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 1.216819973718791) internal successors, (1852), 1522 states have internal predecessors, (1852), 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) [2021-10-24 10:02:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 1852 transitions. [2021-10-24 10:02:51,839 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 1852 transitions. Word has length 152 [2021-10-24 10:02:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:51,839 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 1852 transitions. [2021-10-24 10:02:51,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2021-10-24 10:02:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 1852 transitions. [2021-10-24 10:02:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-24 10:02:51,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:51,845 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-10-24 10:02:51,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-24 10:02:51,846 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1186107752, now seen corresponding path program 1 times [2021-10-24 10:02:51,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:51,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655827215] [2021-10-24 10:02:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:51,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-24 10:02:51,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:51,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655827215] [2021-10-24 10:02:51,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655827215] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:51,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:51,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:02:51,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527042096] [2021-10-24 10:02:51,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:51,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:51,983 INFO L87 Difference]: Start difference. First operand 1523 states and 1852 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2021-10-24 10:02:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:52,257 INFO L93 Difference]: Finished difference Result 2565 states and 3086 transitions. [2021-10-24 10:02:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 165 [2021-10-24 10:02:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:52,264 INFO L225 Difference]: With dead ends: 2565 [2021-10-24 10:02:52,264 INFO L226 Difference]: Without dead ends: 1203 [2021-10-24 10:02:52,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:02:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-10-24 10:02:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1203. [2021-10-24 10:02:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.1106489184692179) internal successors, (1335), 1202 states have internal predecessors, (1335), 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) [2021-10-24 10:02:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1335 transitions. [2021-10-24 10:02:52,298 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1335 transitions. Word has length 165 [2021-10-24 10:02:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:52,298 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1335 transitions. [2021-10-24 10:02:52,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2021-10-24 10:02:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1335 transitions. [2021-10-24 10:02:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-10-24 10:02:52,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:52,303 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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, 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] [2021-10-24 10:02:52,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-24 10:02:52,304 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:52,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1927550809, now seen corresponding path program 1 times [2021-10-24 10:02:52,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:52,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216153310] [2021-10-24 10:02:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:52,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:52,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:52,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216153310] [2021-10-24 10:02:52,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216153310] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:52,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:52,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:02:52,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214505719] [2021-10-24 10:02:52,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:02:52,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:52,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:02:52,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:02:52,409 INFO L87 Difference]: Start difference. First operand 1203 states and 1335 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2021-10-24 10:02:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:52,789 INFO L93 Difference]: Finished difference Result 2325 states and 2586 transitions. [2021-10-24 10:02:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:02:52,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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 178 [2021-10-24 10:02:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:52,796 INFO L225 Difference]: With dead ends: 2325 [2021-10-24 10:02:52,797 INFO L226 Difference]: Without dead ends: 1203 [2021-10-24 10:02:52,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:02:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-10-24 10:02:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1203. [2021-10-24 10:02:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.1073211314475873) internal successors, (1331), 1202 states have internal predecessors, (1331), 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) [2021-10-24 10:02:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1331 transitions. [2021-10-24 10:02:52,829 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1331 transitions. Word has length 178 [2021-10-24 10:02:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:52,829 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1331 transitions. [2021-10-24 10:02:52,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2021-10-24 10:02:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1331 transitions. [2021-10-24 10:02:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-10-24 10:02:52,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:52,834 INFO L512 BasicCegarLoop]: trace histogram [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, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:02:52,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-24 10:02:52,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:52,835 INFO L82 PathProgramCache]: Analyzing trace with hash -32399723, now seen corresponding path program 1 times [2021-10-24 10:02:52,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:52,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710805624] [2021-10-24 10:02:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:52,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 93 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:53,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:53,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710805624] [2021-10-24 10:02:53,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710805624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:02:53,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554219057] [2021-10-24 10:02:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:53,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:02:53,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:02:53,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:02:53,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:02:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:53,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 10:02:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:02:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-24 10:02:53,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:02:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-24 10:02:54,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554219057] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:54,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:02:54,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-10-24 10:02:54,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543798851] [2021-10-24 10:02:54,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:02:54,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:54,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:02:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:02:54,269 INFO L87 Difference]: Start difference. First operand 1203 states and 1331 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-10-24 10:02:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:54,507 INFO L93 Difference]: Finished difference Result 2645 states and 2951 transitions. [2021-10-24 10:02:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:02:54,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 210 [2021-10-24 10:02:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:54,516 INFO L225 Difference]: With dead ends: 2645 [2021-10-24 10:02:54,516 INFO L226 Difference]: Without dead ends: 1523 [2021-10-24 10:02:54,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:02:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-10-24 10:02:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 963. [2021-10-24 10:02:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.0966735966735968) internal successors, (1055), 962 states have internal predecessors, (1055), 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) [2021-10-24 10:02:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1055 transitions. [2021-10-24 10:02:54,568 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1055 transitions. Word has length 210 [2021-10-24 10:02:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:54,569 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1055 transitions. [2021-10-24 10:02:54,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-10-24 10:02:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1055 transitions. [2021-10-24 10:02:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-10-24 10:02:54,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:54,574 INFO L512 BasicCegarLoop]: trace histogram [5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-24 10:02:54,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:02:54,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-24 10:02:54,794 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2080704400, now seen corresponding path program 1 times [2021-10-24 10:02:54,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:54,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565198379] [2021-10-24 10:02:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:54,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-24 10:02:54,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:54,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565198379] [2021-10-24 10:02:54,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565198379] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:02:54,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:02:54,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:02:54,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167043544] [2021-10-24 10:02:54,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:02:54,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:02:54,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:02:54,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:02:54,939 INFO L87 Difference]: Start difference. First operand 963 states and 1055 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 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) [2021-10-24 10:02:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:02:55,298 INFO L93 Difference]: Finished difference Result 1845 states and 2026 transitions. [2021-10-24 10:02:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:02:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 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 223 [2021-10-24 10:02:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:02:55,304 INFO L225 Difference]: With dead ends: 1845 [2021-10-24 10:02:55,304 INFO L226 Difference]: Without dead ends: 963 [2021-10-24 10:02:55,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:02:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-10-24 10:02:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-10-24 10:02:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.0935550935550935) internal successors, (1052), 962 states have internal predecessors, (1052), 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) [2021-10-24 10:02:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1052 transitions. [2021-10-24 10:02:55,330 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1052 transitions. Word has length 223 [2021-10-24 10:02:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:02:55,330 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1052 transitions. [2021-10-24 10:02:55,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 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) [2021-10-24 10:02:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1052 transitions. [2021-10-24 10:02:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-10-24 10:02:55,335 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:02:55,336 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 2, 2, 2, 2, 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] [2021-10-24 10:02:55,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-24 10:02:55,336 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:02:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:02:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1957343947, now seen corresponding path program 1 times [2021-10-24 10:02:55,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:02:55,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329485766] [2021-10-24 10:02:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:55,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:02:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 192 proven. 177 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-24 10:02:55,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:02:55,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329485766] [2021-10-24 10:02:55,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329485766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:02:55,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260193977] [2021-10-24 10:02:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:55,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:02:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:02:55,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:02:55,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-24 10:02:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:02:55,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:02:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-10-24 10:02:58,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:03:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-10-24 10:03:01,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260193977] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:03:01,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:03:01,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 9 [2021-10-24 10:03:01,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493794118] [2021-10-24 10:03:01,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:03:01,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:03:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:03:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:03:01,576 INFO L87 Difference]: Start difference. First operand 963 states and 1052 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 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) [2021-10-24 10:03:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:03:02,124 INFO L93 Difference]: Finished difference Result 1925 states and 2102 transitions. [2021-10-24 10:03:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:03:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 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 273 [2021-10-24 10:03:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:03:02,130 INFO L225 Difference]: With dead ends: 1925 [2021-10-24 10:03:02,130 INFO L226 Difference]: Without dead ends: 883 [2021-10-24 10:03:02,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:03:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-10-24 10:03:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2021-10-24 10:03:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.0861678004535147) internal successors, (958), 882 states have internal predecessors, (958), 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) [2021-10-24 10:03:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 958 transitions. [2021-10-24 10:03:02,154 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 958 transitions. Word has length 273 [2021-10-24 10:03:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:03:02,154 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 958 transitions. [2021-10-24 10:03:02,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 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) [2021-10-24 10:03:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 958 transitions. [2021-10-24 10:03:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-10-24 10:03:02,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:03:02,160 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 2, 2, 2, 2, 2, 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] [2021-10-24 10:03:02,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:03:02,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:03:02,374 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:03:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:03:02,375 INFO L82 PathProgramCache]: Analyzing trace with hash -945924387, now seen corresponding path program 1 times [2021-10-24 10:03:02,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:03:02,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291176434] [2021-10-24 10:03:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:03:02,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:03:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:03:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 197 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-24 10:03:02,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:03:02,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291176434] [2021-10-24 10:03:02,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291176434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:03:02,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419760541] [2021-10-24 10:03:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:03:02,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:03:02,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:03:02,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:03:02,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-24 10:03:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:03:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:03:03,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:03:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-10-24 10:03:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:03:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-10-24 10:03:05,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419760541] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:03:05,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:03:05,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 9 [2021-10-24 10:03:05,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640008476] [2021-10-24 10:03:05,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:03:05,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:03:05,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:03:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:03:05,863 INFO L87 Difference]: Start difference. First operand 883 states and 958 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 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) [2021-10-24 10:03:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:03:06,226 INFO L93 Difference]: Finished difference Result 1363 states and 1464 transitions. [2021-10-24 10:03:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:03:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 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 278 [2021-10-24 10:03:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:03:06,227 INFO L225 Difference]: With dead ends: 1363 [2021-10-24 10:03:06,227 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:03:06,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:03:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:03:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:03:06,229 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) [2021-10-24 10:03:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:03:06,229 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 278 [2021-10-24 10:03:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:03:06,230 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:03:06,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 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) [2021-10-24 10:03:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:03:06,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:03:06,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:03:06,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:03:06,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-24 10:03:06,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 10:03:06,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:03:06,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:03:06,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:03:07,037 INFO L857 garLoopResultBuilder]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-10-24 10:03:07,037 INFO L857 garLoopResultBuilder]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-10-24 10:03:07,038 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L445-1(lines 39 608) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L448-1(lines 39 608) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-10-24 10:03:07,039 INFO L857 garLoopResultBuilder]: For program point L449(line 449) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-10-24 10:03:07,040 INFO L857 garLoopResultBuilder]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 449) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-10-24 10:03:07,041 INFO L857 garLoopResultBuilder]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-10-24 10:03:07,042 INFO L857 garLoopResultBuilder]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-10-24 10:03:07,043 INFO L857 garLoopResultBuilder]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-10-24 10:03:07,043 INFO L857 garLoopResultBuilder]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-10-24 10:03:07,043 INFO L853 garLoopResultBuilder]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse8 (= ~a25~0 ~a11~0)) (.cse1 (= ~a17~0 8)) (.cse3 (= ~a21~0 1)) (.cse11 (<= ~a19~0 0)) (.cse9 (<= ~a11~0 0)) (.cse10 (<= ~a28~0 7)) (.cse7 (<= 9 ~a28~0)) (.cse6 (<= ~a17~0 8)) (.cse5 (= ~a19~0 1)) (.cse0 (<= 10 ~a28~0)) (.cse12 (<= ~a17~0 7)) (.cse4 (<= ~a28~0 10)) (.cse2 (= ~a25~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse1 (= 7 ~a28~0) (= ~a11~0 1) (not .cse5) .cse3) (and .cse0 .cse6 .cse4 .cse5) (and .cse1 .cse2 .cse3 .cse5) (and .cse1 .cse7 .cse3 .cse4 .cse5) (and .cse1 .cse8 .cse3 .cse9 .cse5 .cse10) (and .cse2 .cse6 .cse5 .cse10) (and .cse1 .cse3 .cse10 .cse11) (and .cse8 .cse7 .cse2 .cse12 .cse4) (and .cse1 .cse3 (= ~a28~0 8) (= ~a25~0 0) .cse11) (and .cse2 .cse9 .cse5 .cse10) (and .cse7 .cse2 .cse6 .cse4 .cse5) (and .cse0 .cse12 .cse4 (not .cse2)))) [2021-10-24 10:03:07,043 INFO L857 garLoopResultBuilder]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-10-24 10:03:07,043 INFO L857 garLoopResultBuilder]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-10-24 10:03:07,043 INFO L860 garLoopResultBuilder]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-10-24 10:03:07,044 INFO L853 garLoopResultBuilder]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse8 (= ~a25~0 ~a11~0)) (.cse1 (= ~a17~0 8)) (.cse3 (= ~a21~0 1)) (.cse11 (<= ~a19~0 0)) (.cse9 (<= ~a11~0 0)) (.cse10 (<= ~a28~0 7)) (.cse7 (<= 9 ~a28~0)) (.cse6 (<= ~a17~0 8)) (.cse5 (= ~a19~0 1)) (.cse0 (<= 10 ~a28~0)) (.cse12 (<= ~a17~0 7)) (.cse4 (<= ~a28~0 10)) (.cse2 (= ~a25~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse1 (= 7 ~a28~0) (= ~a11~0 1) (not .cse5) .cse3) (and .cse0 .cse6 .cse4 .cse5) (and .cse1 .cse2 .cse3 .cse5) (and .cse1 .cse7 .cse3 .cse4 .cse5) (and .cse1 .cse8 .cse3 .cse9 .cse5 .cse10) (and .cse2 .cse6 .cse5 .cse10) (and .cse1 .cse3 .cse10 .cse11) (and .cse8 .cse7 .cse2 .cse12 .cse4) (and .cse1 .cse3 (= ~a28~0 8) (= ~a25~0 0) .cse11) (and .cse2 .cse9 .cse5 .cse10) (and .cse7 .cse2 .cse6 .cse4 .cse5) (and .cse0 .cse12 .cse4 (not .cse2)))) [2021-10-24 10:03:07,044 INFO L857 garLoopResultBuilder]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L621(line 621) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-10-24 10:03:07,045 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-10-24 10:03:07,046 INFO L857 garLoopResultBuilder]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-10-24 10:03:07,046 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-10-24 10:03:07,046 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-10-24 10:03:07,046 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-10-24 10:03:07,050 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:03:07,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:03:07 BoogieIcfgContainer [2021-10-24 10:03:07,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:03:07,075 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:03:07,075 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:03:07,075 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:03:07,075 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:02:45" (3/4) ... [2021-10-24 10:03:07,078 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:03:07,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 114 nodes and edges [2021-10-24 10:03:07,102 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-10-24 10:03:07,104 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-24 10:03:07,106 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-24 10:03:07,213 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:03:07,213 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:03:07,214 INFO L168 Benchmark]: Toolchain (without parser) took 25063.18 ms. Allocated memory was 100.7 MB in the beginning and 356.5 MB in the end (delta: 255.9 MB). Free memory was 60.0 MB in the beginning and 165.6 MB in the end (delta: -105.6 MB). Peak memory consumption was 152.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:03:07,214 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 100.7 MB. Free memory is still 78.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:03:07,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 612.59 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 59.7 MB in the beginning and 92.7 MB in the end (delta: -33.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:03:07,215 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.48 ms. Allocated memory is still 130.0 MB. Free memory was 92.7 MB in the beginning and 87.4 MB in the end (delta: 5.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:03:07,216 INFO L168 Benchmark]: Boogie Preprocessor took 95.37 ms. Allocated memory is still 130.0 MB. Free memory was 87.4 MB in the beginning and 83.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:03:07,216 INFO L168 Benchmark]: RCFGBuilder took 2052.98 ms. Allocated memory is still 130.0 MB. Free memory was 83.2 MB in the beginning and 96.9 MB in the end (delta: -13.6 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. [2021-10-24 10:03:07,216 INFO L168 Benchmark]: TraceAbstraction took 22054.69 ms. Allocated memory was 130.0 MB in the beginning and 356.5 MB in the end (delta: 226.5 MB). Free memory was 96.9 MB in the beginning and 181.3 MB in the end (delta: -84.4 MB). Peak memory consumption was 141.9 MB. Max. memory is 16.1 GB. [2021-10-24 10:03:07,217 INFO L168 Benchmark]: Witness Printer took 138.38 ms. Allocated memory is still 356.5 MB. Free memory was 181.3 MB in the beginning and 165.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:03:07,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 100.7 MB. Free memory is still 78.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 612.59 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 59.7 MB in the beginning and 92.7 MB in the end (delta: -33.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 102.48 ms. Allocated memory is still 130.0 MB. Free memory was 92.7 MB in the beginning and 87.4 MB in the end (delta: 5.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 95.37 ms. Allocated memory is still 130.0 MB. Free memory was 87.4 MB in the beginning and 83.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2052.98 ms. Allocated memory is still 130.0 MB. Free memory was 83.2 MB in the beginning and 96.9 MB in the end (delta: -13.6 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22054.69 ms. Allocated memory was 130.0 MB in the beginning and 356.5 MB in the end (delta: 226.5 MB). Free memory was 96.9 MB in the beginning and 181.3 MB in the end (delta: -84.4 MB). Peak memory consumption was 141.9 MB. Max. memory is 16.1 GB. * Witness Printer took 138.38 ms. Allocated memory is still 356.5 MB. Free memory was 181.3 MB in the beginning and 165.6 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: 449]: 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, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21936.9ms, OverallIterations: 16, TraceHistogramMax: 6, EmptinessCheckTime: 106.6ms, AutomataDifference: 6127.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 594.0ms, InitialAbstractionConstructionTime: 27.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1314 SDtfs, 1048 SDslu, 110 SDs, 0 SdLazy, 4300 SolverSat, 681 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4209.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1758 GetRequests, 1717 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 251.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2163occurred in iteration=7, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 636.4ms AutomataMinimizationTime, 16 MinimizatonAttempts, 1200 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 37 NumberOfFragments, 393 HoareAnnotationTreeSize, 3 FomulaSimplifications, 892 FormulaSimplificationTreeSizeReduction, 91.0ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 196 FormulaSimplificationTreeSizeReductionInter, 496.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 243.6ms SsaConstructionTime, 683.0ms SatisfiabilityAnalysisTime, 11231.6ms InterpolantComputationTime, 3236 NumberOfCodeBlocks, 3236 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 4066 ConstructedInterpolants, 0 QuantifiedInterpolants, 18965 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1580 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 24 InterpolantComputations, 20 PerfectInterpolantSequences, 3635/4118 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: 616]: Loop Invariant Derived loop invariant: (((((((((((((((10 <= a28 && a17 == 8) && a25 == 1) && a21 == 1) && a28 <= 10) || ((((a17 == 8 && 7 == a28) && a11 == 1) && !(a19 == 1)) && a21 == 1)) || (((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((a17 == 8 && a25 == 1) && a21 == 1) && a19 == 1)) || ((((a17 == 8 && 9 <= a28) && a21 == 1) && a28 <= 10) && a19 == 1)) || (((((a17 == 8 && a25 == a11) && a21 == 1) && a11 <= 0) && a19 == 1) && a28 <= 7)) || (((a25 == 1 && a17 <= 8) && a19 == 1) && a28 <= 7)) || (((a17 == 8 && a21 == 1) && a28 <= 7) && a19 <= 0)) || ((((a25 == a11 && 9 <= a28) && a25 == 1) && a17 <= 7) && a28 <= 10)) || ((((a17 == 8 && a21 == 1) && a28 == 8) && a25 == 0) && a19 <= 0)) || (((a25 == 1 && a11 <= 0) && a19 == 1) && a28 <= 7)) || ((((9 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((10 <= a28 && a17 <= 7) && a28 <= 10) && !(a25 == 1)) - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((((((10 <= a28 && a17 == 8) && a25 == 1) && a21 == 1) && a28 <= 10) || ((((a17 == 8 && 7 == a28) && a11 == 1) && !(a19 == 1)) && a21 == 1)) || (((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((a17 == 8 && a25 == 1) && a21 == 1) && a19 == 1)) || ((((a17 == 8 && 9 <= a28) && a21 == 1) && a28 <= 10) && a19 == 1)) || (((((a17 == 8 && a25 == a11) && a21 == 1) && a11 <= 0) && a19 == 1) && a28 <= 7)) || (((a25 == 1 && a17 <= 8) && a19 == 1) && a28 <= 7)) || (((a17 == 8 && a21 == 1) && a28 <= 7) && a19 <= 0)) || ((((a25 == a11 && 9 <= a28) && a25 == 1) && a17 <= 7) && a28 <= 10)) || ((((a17 == 8 && a21 == 1) && a28 == 8) && a25 == 0) && a19 <= 0)) || (((a25 == 1 && a11 <= 0) && a19 == 1) && a28 <= 7)) || ((((9 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((10 <= a28 && a17 <= 7) && a28 <= 10) && !(a25 == 1)) RESULT: Ultimate proved your program to be correct! [2021-10-24 10:03:07,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf5bf400-6283-4375-ab06-68cc44988504/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...