./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe031_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe031_tso.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8 --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 26b6897a83c9df9076ea7ea4c612ce46453382fa627c0d6af54da2d169befd96 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:17:54,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:17:54,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:17:54,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:17:54,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:17:54,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:17:54,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:17:54,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:17:54,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:17:54,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:17:54,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:17:54,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:17:54,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:17:54,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:17:54,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:17:54,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:17:54,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:17:54,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:17:54,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:17:54,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:17:54,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:17:54,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:17:54,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:17:54,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:17:54,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:17:54,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:17:54,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:17:54,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:17:54,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:17:54,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:17:54,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:17:54,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:17:54,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:17:54,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:17:54,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:17:54,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:17:54,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:17:54,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:17:54,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:17:54,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:17:54,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:17:54,858 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:17:54,886 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:17:54,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:17:54,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:17:54,887 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:17:54,888 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:17:54,888 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:17:54,888 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:17:54,888 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:17:54,888 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:17:54,889 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:17:54,889 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:17:54,889 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:17:54,889 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:17:54,889 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:17:54,890 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:17:54,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:17:54,891 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:17:54,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:17:54,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:17:54,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:17:54,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:17:54,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:17:54,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:17:54,892 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:17:54,892 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:17:54,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:17:54,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:17:54,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:17:54,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:17:54,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:17:54,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:54,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:17:54,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:17:54,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:17:54,894 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:17:54,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:17:54,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:17:54,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:17:54,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:17:54,906 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_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26b6897a83c9df9076ea7ea4c612ce46453382fa627c0d6af54da2d169befd96 [2021-11-07 02:17:55,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:17:55,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:17:55,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:17:55,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:17:55,192 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:17:55,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/pthread-wmm/safe031_tso.i [2021-11-07 02:17:55,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/data/62fcef7c8/23042ce14a904993ae47677849648663/FLAG4eb412e12 [2021-11-07 02:17:55,825 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:17:55,826 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/sv-benchmarks/c/pthread-wmm/safe031_tso.i [2021-11-07 02:17:55,843 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/data/62fcef7c8/23042ce14a904993ae47677849648663/FLAG4eb412e12 [2021-11-07 02:17:56,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/data/62fcef7c8/23042ce14a904993ae47677849648663 [2021-11-07 02:17:56,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:17:56,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:17:56,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:56,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:17:56,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:17:56,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1e2a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56, skipping insertion in model container [2021-11-07 02:17:56,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:17:56,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:56,387 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_9b3e6703-ca46-4de8-80ae-38b2e9764017/sv-benchmarks/c/pthread-wmm/safe031_tso.i[945,958] [2021-11-07 02:17:56,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:56,618 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:17:56,637 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_9b3e6703-ca46-4de8-80ae-38b2e9764017/sv-benchmarks/c/pthread-wmm/safe031_tso.i[945,958] [2021-11-07 02:17:56,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:56,742 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:17:56,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56 WrapperNode [2021-11-07 02:17:56,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:56,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:17:56,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:17:56,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:17:56,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:17:56,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:17:56,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:17:56,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:17:56,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:17:56,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:17:56,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:17:56,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:17:56,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (1/1) ... [2021-11-07 02:17:56,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:17:56,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:17:56,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:17:56,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 02:17:56,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 02:17:56,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:17:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:17:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-11-07 02:17:56,965 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-11-07 02:17:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-11-07 02:17:56,965 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-11-07 02:17:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-11-07 02:17:56,966 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-11-07 02:17:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:17:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 02:17:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:17:56,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:17:56,987 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 02:17:57,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:17:57,352 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 02:17:57,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:57 BoogieIcfgContainer [2021-11-07 02:17:57,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:17:57,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:17:57,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:17:57,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:17:57,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:17:56" (1/3) ... [2021-11-07 02:17:57,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e740bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:17:57, skipping insertion in model container [2021-11-07 02:17:57,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:56" (2/3) ... [2021-11-07 02:17:57,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e740bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:17:57, skipping insertion in model container [2021-11-07 02:17:57,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:57" (3/3) ... [2021-11-07 02:17:57,371 INFO L111 eAbstractionObserver]: Analyzing ICFG safe031_tso.i [2021-11-07 02:17:57,379 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 02:17:57,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:17:57,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:17:57,380 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 02:17:57,413 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,413 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,413 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,414 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,414 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,414 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,414 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,415 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,415 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,415 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,416 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,416 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,417 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,417 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,417 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,417 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,417 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,418 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,418 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,418 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,419 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,419 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,419 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,419 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,420 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,420 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,420 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,421 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,421 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,421 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,421 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,421 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,422 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,422 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,422 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,423 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,426 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,427 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,427 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,427 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,432 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,433 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,433 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,433 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,436 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,437 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,437 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,437 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:17:57,439 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-07 02:17:57,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:17:57,492 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 [2021-11-07 02:17:57,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 02:17:57,506 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 02:17:57,517 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 83 transitions, 181 flow [2021-11-07 02:17:57,520 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 83 transitions, 181 flow [2021-11-07 02:17:57,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 83 transitions, 181 flow [2021-11-07 02:17:57,567 INFO L129 PetriNetUnfolder]: 2/80 cut-off events. [2021-11-07 02:17:57,567 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 02:17:57,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 80 events. 2/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2021-11-07 02:17:57,574 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2021-11-07 02:18:00,559 INFO L131 LiptonReduction]: Checked pairs total: 2709 [2021-11-07 02:18:00,559 INFO L133 LiptonReduction]: Total number of compositions: 74 [2021-11-07 02:18:00,567 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 57 flow [2021-11-07 02:18:00,594 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 234 states, 233 states have (on average 2.815450643776824) internal successors, (656), 233 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 234 states, 233 states have (on average 2.815450643776824) internal successors, (656), 233 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:18:00,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:00,604 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:00,605 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:18:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash -202830115, now seen corresponding path program 1 times [2021-11-07 02:18:00,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:18:00,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168280884] [2021-11-07 02:18:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:00,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:18:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:00,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:18:00,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168280884] [2021-11-07 02:18:00,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168280884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:00,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:00,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 02:18:00,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823163387] [2021-11-07 02:18:00,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:00,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:18:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:00,914 INFO L87 Difference]: Start difference. First operand has 234 states, 233 states have (on average 2.815450643776824) internal successors, (656), 233 states have internal predecessors, (656), 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, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:00,956 INFO L93 Difference]: Finished difference Result 356 states and 928 transitions. [2021-11-07 02:18:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:00,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 02:18:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:00,972 INFO L225 Difference]: With dead ends: 356 [2021-11-07 02:18:00,972 INFO L226 Difference]: Without dead ends: 316 [2021-11-07 02:18:00,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-07 02:18:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 278. [2021-11-07 02:18:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.6389891696750905) internal successors, (731), 277 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 731 transitions. [2021-11-07 02:18:01,037 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 731 transitions. Word has length 8 [2021-11-07 02:18:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:01,039 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 731 transitions. [2021-11-07 02:18:01,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 731 transitions. [2021-11-07 02:18:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:18:01,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:01,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:01,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:18:01,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:18:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 590217044, now seen corresponding path program 1 times [2021-11-07 02:18:01,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:18:01,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37416097] [2021-11-07 02:18:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:01,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:18:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:01,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:18:01,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37416097] [2021-11-07 02:18:01,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37416097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:01,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:18:01,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590011911] [2021-11-07 02:18:01,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:01,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:18:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,135 INFO L87 Difference]: Start difference. First operand 278 states and 731 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:01,158 INFO L93 Difference]: Finished difference Result 304 states and 773 transitions. [2021-11-07 02:18:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-07 02:18:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:01,163 INFO L225 Difference]: With dead ends: 304 [2021-11-07 02:18:01,163 INFO L226 Difference]: Without dead ends: 304 [2021-11-07 02:18:01,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-07 02:18:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 272. [2021-11-07 02:18:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.6162361623616235) internal successors, (709), 271 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 709 transitions. [2021-11-07 02:18:01,189 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 709 transitions. Word has length 9 [2021-11-07 02:18:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:01,190 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 709 transitions. [2021-11-07 02:18:01,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 709 transitions. [2021-11-07 02:18:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:18:01,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:01,192 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:01,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:18:01,192 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:18:01,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1992767584, now seen corresponding path program 1 times [2021-11-07 02:18:01,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:18:01,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013279551] [2021-11-07 02:18:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:01,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:18:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:01,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:18:01,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013279551] [2021-11-07 02:18:01,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013279551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:01,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:01,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:18:01,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238319470] [2021-11-07 02:18:01,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:01,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:18:01,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:01,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,346 INFO L87 Difference]: Start difference. First operand 272 states and 709 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:01,371 INFO L93 Difference]: Finished difference Result 290 states and 735 transitions. [2021-11-07 02:18:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-07 02:18:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:01,375 INFO L225 Difference]: With dead ends: 290 [2021-11-07 02:18:01,375 INFO L226 Difference]: Without dead ends: 290 [2021-11-07 02:18:01,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-07 02:18:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 256. [2021-11-07 02:18:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.603921568627451) internal successors, (664), 255 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 664 transitions. [2021-11-07 02:18:01,393 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 664 transitions. Word has length 9 [2021-11-07 02:18:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:01,394 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 664 transitions. [2021-11-07 02:18:01,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 664 transitions. [2021-11-07 02:18:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 02:18:01,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:01,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:01,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 02:18:01,397 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:18:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:01,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1116857865, now seen corresponding path program 1 times [2021-11-07 02:18:01,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:18:01,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68919003] [2021-11-07 02:18:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:01,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:18:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:01,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:18:01,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68919003] [2021-11-07 02:18:01,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68919003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:01,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:01,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:18:01,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833131870] [2021-11-07 02:18:01,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:01,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:18:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:01,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:01,468 INFO L87 Difference]: Start difference. First operand 256 states and 664 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:01,485 INFO L93 Difference]: Finished difference Result 209 states and 481 transitions. [2021-11-07 02:18:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 02:18:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:01,488 INFO L225 Difference]: With dead ends: 209 [2021-11-07 02:18:01,488 INFO L226 Difference]: Without dead ends: 209 [2021-11-07 02:18:01,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:01,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-07 02:18:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-07 02:18:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3125) internal successors, (481), 208 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 481 transitions. [2021-11-07 02:18:01,503 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 481 transitions. Word has length 10 [2021-11-07 02:18:01,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:01,503 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 481 transitions. [2021-11-07 02:18:01,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 481 transitions. [2021-11-07 02:18:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 02:18:01,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:01,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:01,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 02:18:01,509 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:18:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash 663737646, now seen corresponding path program 1 times [2021-11-07 02:18:01,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:18:01,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072733984] [2021-11-07 02:18:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:01,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:18:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:01,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:18:01,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072733984] [2021-11-07 02:18:01,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072733984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:01,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:01,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:18:01,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601050427] [2021-11-07 02:18:01,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:01,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:18:01,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,618 INFO L87 Difference]: Start difference. First operand 209 states and 481 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:01,649 INFO L93 Difference]: Finished difference Result 155 states and 326 transitions. [2021-11-07 02:18:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 02:18:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:01,651 INFO L225 Difference]: With dead ends: 155 [2021-11-07 02:18:01,651 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 02:18:01,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 02:18:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-11-07 02:18:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.072463768115942) internal successors, (286), 138 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 286 transitions. [2021-11-07 02:18:01,658 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 286 transitions. Word has length 12 [2021-11-07 02:18:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:01,658 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 286 transitions. [2021-11-07 02:18:01,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 286 transitions. [2021-11-07 02:18:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:18:01,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:01,660 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:01,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 02:18:01,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:18:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash 55483077, now seen corresponding path program 1 times [2021-11-07 02:18:01,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:18:01,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066639453] [2021-11-07 02:18:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:01,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:18:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:01,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:18:01,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066639453] [2021-11-07 02:18:01,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066639453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:01,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:01,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:18:01,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776697651] [2021-11-07 02:18:01,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:01,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:18:01,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:01,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,724 INFO L87 Difference]: Start difference. First operand 139 states and 286 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:01,743 INFO L93 Difference]: Finished difference Result 168 states and 329 transitions. [2021-11-07 02:18:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:01,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 02:18:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:01,745 INFO L225 Difference]: With dead ends: 168 [2021-11-07 02:18:01,745 INFO L226 Difference]: Without dead ends: 95 [2021-11-07 02:18:01,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-07 02:18:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-11-07 02:18:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.7634408602150538) internal successors, (164), 93 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 164 transitions. [2021-11-07 02:18:01,750 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 164 transitions. Word has length 14 [2021-11-07 02:18:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:01,750 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 164 transitions. [2021-11-07 02:18:01,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 164 transitions. [2021-11-07 02:18:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:18:01,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:01,752 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:01,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 02:18:01,752 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:18:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1393099782, now seen corresponding path program 1 times [2021-11-07 02:18:01,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:18:01,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021895636] [2021-11-07 02:18:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:01,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:18:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:01,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:18:01,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021895636] [2021-11-07 02:18:01,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021895636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:01,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:01,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:18:01,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829877607] [2021-11-07 02:18:01,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:01,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:18:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,865 INFO L87 Difference]: Start difference. First operand 94 states and 164 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:01,889 INFO L93 Difference]: Finished difference Result 110 states and 185 transitions. [2021-11-07 02:18:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 02:18:01,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:01,893 INFO L225 Difference]: With dead ends: 110 [2021-11-07 02:18:01,894 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 02:18:01,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 02:18:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-11-07 02:18:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.75) internal successors, (161), 92 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 161 transitions. [2021-11-07 02:18:01,907 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 161 transitions. Word has length 14 [2021-11-07 02:18:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:01,908 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 161 transitions. [2021-11-07 02:18:01,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 161 transitions. [2021-11-07 02:18:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:18:01,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:01,911 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:01,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 02:18:01,912 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:18:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash -637851054, now seen corresponding path program 2 times [2021-11-07 02:18:01,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:18:01,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564142798] [2021-11-07 02:18:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:01,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:18:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:02,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:18:02,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564142798] [2021-11-07 02:18:02,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564142798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:02,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:02,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:18:02,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458979234] [2021-11-07 02:18:02,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:18:02,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:18:02,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:18:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:02,012 INFO L87 Difference]: Start difference. First operand 93 states and 161 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:02,031 INFO L93 Difference]: Finished difference Result 79 states and 141 transitions. [2021-11-07 02:18:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:02,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 02:18:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:02,032 INFO L225 Difference]: With dead ends: 79 [2021-11-07 02:18:02,033 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 02:18:02,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 02:18:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 02:18:02,034 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) [2021-11-07 02:18:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 02:18:02,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-11-07 02:18:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:02,034 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 02:18:02,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 02:18:02,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 02:18:02,037 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 02:18:02,038 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 02:18:02,043 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-11-07 02:18:02,043 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-11-07 02:18:02,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 02:18:02,045 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:02,047 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-07 02:18:02,047 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 02:18:02,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:18:02 BasicIcfg [2021-11-07 02:18:02,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 02:18:02,053 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 02:18:02,054 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 02:18:02,054 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 02:18:02,054 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:57" (3/4) ... [2021-11-07 02:18:02,057 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 02:18:02,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-11-07 02:18:02,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-11-07 02:18:02,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-11-07 02:18:02,072 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-07 02:18:02,072 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 02:18:02,072 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 02:18:02,073 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 02:18:02,124 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 02:18:02,124 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 02:18:02,126 INFO L168 Benchmark]: Toolchain (without parser) took 5939.13 ms. Allocated memory was 109.1 MB in the beginning and 161.5 MB in the end (delta: 52.4 MB). Free memory was 78.9 MB in the beginning and 97.9 MB in the end (delta: -19.0 MB). Peak memory consumption was 33.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:02,127 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 109.1 MB. Free memory was 82.5 MB in the beginning and 82.4 MB in the end (delta: 54.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:18:02,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.05 ms. Allocated memory is still 109.1 MB. Free memory was 78.7 MB in the beginning and 59.5 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:02,130 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.43 ms. Allocated memory is still 109.1 MB. Free memory was 59.3 MB in the beginning and 57.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:02,131 INFO L168 Benchmark]: Boogie Preprocessor took 45.60 ms. Allocated memory is still 109.1 MB. Free memory was 57.4 MB in the beginning and 56.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:02,131 INFO L168 Benchmark]: RCFGBuilder took 488.42 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 56.0 MB in the beginning and 103.4 MB in the end (delta: -47.4 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:02,132 INFO L168 Benchmark]: TraceAbstraction took 4695.90 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 102.9 MB in the beginning and 101.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:02,132 INFO L168 Benchmark]: Witness Printer took 71.11 ms. Allocated memory is still 161.5 MB. Free memory was 101.1 MB in the beginning and 97.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:02,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 109.1 MB. Free memory was 82.5 MB in the beginning and 82.4 MB in the end (delta: 54.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 554.05 ms. Allocated memory is still 109.1 MB. Free memory was 78.7 MB in the beginning and 59.5 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.43 ms. Allocated memory is still 109.1 MB. Free memory was 59.3 MB in the beginning and 57.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.60 ms. Allocated memory is still 109.1 MB. Free memory was 57.4 MB in the beginning and 56.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 488.42 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 56.0 MB in the beginning and 103.4 MB in the end (delta: -47.4 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4695.90 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 102.9 MB in the beginning and 101.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. * Witness Printer took 71.11 ms. Allocated memory is still 161.5 MB. Free memory was 101.1 MB in the beginning and 97.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 91 PlacesBefore, 31 PlacesAfterwards, 83 TransitionsBefore, 21 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 2 ChoiceCompositions, 74 TotalNumberOfCompositions, 2709 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1316, positive: 1223, positive conditional: 0, positive unconditional: 1223, negative: 93, negative conditional: 0, negative unconditional: 93, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 934, positive: 900, positive conditional: 0, positive unconditional: 900, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 934, positive: 887, positive conditional: 0, positive unconditional: 887, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 47, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 99, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 72, negative conditional: 0, negative unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1316, positive: 323, positive conditional: 0, positive unconditional: 323, negative: 59, negative conditional: 0, negative unconditional: 59, unknown: 934, unknown conditional: 0, unknown unconditional: 934] , Statistics on independence cache: Total cache size (in pairs): 61, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: 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 with 1 thread instances CFG has 7 procedures, 106 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 156 SDtfs, 139 SDslu, 145 SDs, 0 SdLazy, 59 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=278occurred in iteration=1, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 121 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 383 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be correct! [2021-11-07 02:18:02,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3e6703-ca46-4de8-80ae-38b2e9764017/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE