./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI --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 257fbefed94a1e5b18da17b648f63b8a4a376ab6bd67ba2a090c30b5997c5667 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:49:27,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:49:27,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:49:27,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:49:27,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:49:27,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:49:27,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:49:27,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:49:27,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:49:27,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:49:27,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:49:27,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:49:27,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:49:27,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:49:27,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:49:27,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:49:27,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:49:27,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:49:27,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:49:27,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:49:27,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:49:27,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:49:27,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:49:27,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:49:27,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:49:27,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:49:27,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:49:27,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:49:27,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:49:27,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:49:27,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:49:27,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:49:27,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:49:27,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:49:27,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:49:27,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:49:27,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:49:27,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:49:27,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:49:27,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:49:27,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:49:27,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:49:27,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:49:27,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:49:27,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:49:27,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:49:27,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:49:27,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:49:27,847 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:49:27,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:49:27,848 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:49:27,848 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:49:27,849 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:49:27,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:49:27,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:49:27,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:49:27,850 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:49:27,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:49:27,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:49:27,851 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:49:27,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:49:27,852 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:49:27,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:49:27,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:49:27,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:49:27,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:49:27,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:49:27,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:49:27,854 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:49:27,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:49:27,854 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:49:27,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:49:27,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:49:27,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:49:27,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:27,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:49:27,856 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:49:27,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:49:27,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:49:27,857 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:49:27,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:49:27,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:49:27,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:49:27,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 257fbefed94a1e5b18da17b648f63b8a4a376ab6bd67ba2a090c30b5997c5667 [2022-11-03 02:49:28,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:49:28,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:49:28,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:49:28,235 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:49:28,236 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:49:28,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c [2022-11-03 02:49:28,327 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/data/c1ab9570a/5854da38672c4b46aa11516a47de007b/FLAG10d050ca3 [2022-11-03 02:49:29,653 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:49:29,655 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c [2022-11-03 02:49:29,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/data/c1ab9570a/5854da38672c4b46aa11516a47de007b/FLAG10d050ca3 [2022-11-03 02:49:30,199 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/data/c1ab9570a/5854da38672c4b46aa11516a47de007b [2022-11-03 02:49:30,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:49:30,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:49:30,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:30,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:49:30,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:49:30,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:30" (1/1) ... [2022-11-03 02:49:30,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf6685a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:30, skipping insertion in model container [2022-11-03 02:49:30,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:30" (1/1) ... [2022-11-03 02:49:30,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:49:30,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:49:33,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c[378560,378573] [2022-11-03 02:49:33,074 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c[383339,383352] [2022-11-03 02:49:33,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:33,470 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:49:34,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c[378560,378573] [2022-11-03 02:49:34,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-1.c[383339,383352] [2022-11-03 02:49:34,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:34,849 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:49:34,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34 WrapperNode [2022-11-03 02:49:34,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:34,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:34,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:49:34,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:49:34,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:35,477 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13146 [2022-11-03 02:49:35,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:35,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:49:35,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:49:35,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:49:35,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:35,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:35,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:35,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:35,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:35,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:36,034 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:36,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:36,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:49:36,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:49:36,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:49:36,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:49:36,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:36,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:36,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:36,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:49:36,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:49:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:49:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:49:36,460 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:49:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:49:36,460 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:49:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:49:36,461 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:49:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 02:49:36,461 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 02:49:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:49:36,461 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:49:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:49:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:49:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:49:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:49:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:49:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:49:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:49:36,721 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:49:36,724 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:49:47,018 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:49:49,813 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:49:49,813 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-03 02:49:49,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:49 BoogieIcfgContainer [2022-11-03 02:49:49,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:49:49,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:49:49,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:49:49,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:49:49,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:49:30" (1/3) ... [2022-11-03 02:49:49,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4787e3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:49, skipping insertion in model container [2022-11-03 02:49:49,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (2/3) ... [2022-11-03 02:49:49,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4787e3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:49, skipping insertion in model container [2022-11-03 02:49:49,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:49" (3/3) ... [2022-11-03 02:49:49,829 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.11.cil-1.c [2022-11-03 02:49:49,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:49:49,853 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:49:49,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:49:49,962 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@37e2647, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:49:49,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:49:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 02:49:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:49:50,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:50,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:50,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1666047103, now seen corresponding path program 1 times [2022-11-03 02:49:50,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:50,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334532900] [2022-11-03 02:49:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:50,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:50,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:50,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334532900] [2022-11-03 02:49:50,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334532900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:50,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:50,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:49:50,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053501848] [2022-11-03 02:49:50,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:50,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:49:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:50,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:49:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:49:50,701 INFO L87 Difference]: Start difference. First operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:49:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:52,172 INFO L93 Difference]: Finished difference Result 3811 states and 7391 transitions. [2022-11-03 02:49:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:49:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-11-03 02:49:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:52,205 INFO L225 Difference]: With dead ends: 3811 [2022-11-03 02:49:52,206 INFO L226 Difference]: Without dead ends: 1984 [2022-11-03 02:49:52,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:49:52,217 INFO L413 NwaCegarLoop]: 3488 mSDtfsCounter, 3754 mSDsluCounter, 3695 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:52,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3754 Valid, 6880 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:49:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-11-03 02:49:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2022-11-03 02:49:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1921 states have (on average 1.9229567933368037) internal successors, (3694), 1925 states have internal predecessors, (3694), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 02:49:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3788 transitions. [2022-11-03 02:49:52,375 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3788 transitions. Word has length 65 [2022-11-03 02:49:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:52,375 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 3788 transitions. [2022-11-03 02:49:52,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:49:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3788 transitions. [2022-11-03 02:49:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:49:52,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:52,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:52,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:49:52,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1777357337, now seen corresponding path program 1 times [2022-11-03 02:49:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475370701] [2022-11-03 02:49:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:52,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:49:52,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:52,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475370701] [2022-11-03 02:49:52,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475370701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:52,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449668943] [2022-11-03 02:49:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:52,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:52,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:52,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:52,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:49:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:49:53,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:53,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449668943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:53,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:53,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:49:53,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101693231] [2022-11-03 02:49:53,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:53,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:53,427 INFO L87 Difference]: Start difference. First operand 1983 states and 3788 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:49:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:54,036 INFO L93 Difference]: Finished difference Result 2650 states and 4829 transitions. [2022-11-03 02:49:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 02:49:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:54,050 INFO L225 Difference]: With dead ends: 2650 [2022-11-03 02:49:54,050 INFO L226 Difference]: Without dead ends: 2313 [2022-11-03 02:49:54,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:54,054 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 3497 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:54,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3557 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:49:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-11-03 02:49:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2022-11-03 02:49:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2193 states have (on average 1.8718650250797995) internal successors, (4105), 2198 states have internal predecessors, (4105), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-03 02:49:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4279 transitions. [2022-11-03 02:49:54,141 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4279 transitions. Word has length 130 [2022-11-03 02:49:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:54,142 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 4279 transitions. [2022-11-03 02:49:54,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:49:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4279 transitions. [2022-11-03 02:49:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:49:54,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:54,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:54,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:49:54,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:54,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1414400869, now seen corresponding path program 1 times [2022-11-03 02:49:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:54,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946315840] [2022-11-03 02:49:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:49:54,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946315840] [2022-11-03 02:49:54,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946315840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626877930] [2022-11-03 02:49:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:54,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:54,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:54,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:49:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:54,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:49:54,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:54,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626877930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:54,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:54,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:49:54,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037398998] [2022-11-03 02:49:54,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:54,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:54,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:54,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:54,965 INFO L87 Difference]: Start difference. First operand 2307 states and 4279 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:49:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:55,687 INFO L93 Difference]: Finished difference Result 3616 states and 6318 transitions. [2022-11-03 02:49:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:55,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 02:49:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:55,711 INFO L225 Difference]: With dead ends: 3616 [2022-11-03 02:49:55,711 INFO L226 Difference]: Without dead ends: 2955 [2022-11-03 02:49:55,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:55,739 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 3509 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:55,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:49:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-11-03 02:49:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2022-11-03 02:49:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2731 states have (on average 1.7997070670084219) internal successors, (4915), 2738 states have internal predecessors, (4915), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-03 02:49:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5245 transitions. [2022-11-03 02:49:55,886 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5245 transitions. Word has length 130 [2022-11-03 02:49:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:55,887 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 5245 transitions. [2022-11-03 02:49:55,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:49:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5245 transitions. [2022-11-03 02:49:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:49:55,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:55,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:55,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:49:56,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:56,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1553589277, now seen corresponding path program 1 times [2022-11-03 02:49:56,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:56,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929864711] [2022-11-03 02:49:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:56,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:49:56,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:56,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929864711] [2022-11-03 02:49:56,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929864711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:56,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126316020] [2022-11-03 02:49:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:56,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:56,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:56,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:56,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:49:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:56,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:49:56,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:56,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126316020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:56,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:56,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:49:56,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860112994] [2022-11-03 02:49:56,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:56,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:56,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:56,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:56,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:56,686 INFO L87 Difference]: Start difference. First operand 2947 states and 5245 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:49:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:57,510 INFO L93 Difference]: Finished difference Result 5524 states and 9246 transitions. [2022-11-03 02:49:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:57,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 02:49:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:57,532 INFO L225 Difference]: With dead ends: 5524 [2022-11-03 02:49:57,532 INFO L226 Difference]: Without dead ends: 4223 [2022-11-03 02:49:57,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:57,538 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3491 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:57,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:49:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-11-03 02:49:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2022-11-03 02:49:57,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3795 states have (on average 1.7156785243741766) internal successors, (6511), 3806 states have internal predecessors, (6511), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-03 02:49:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7145 transitions. [2022-11-03 02:49:57,712 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7145 transitions. Word has length 130 [2022-11-03 02:49:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:57,713 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 7145 transitions. [2022-11-03 02:49:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:49:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7145 transitions. [2022-11-03 02:49:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:49:57,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:57,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:57,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:57,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:57,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash 287305697, now seen corresponding path program 1 times [2022-11-03 02:49:57,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690834771] [2022-11-03 02:49:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:57,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:49:58,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:58,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690834771] [2022-11-03 02:49:58,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690834771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887501978] [2022-11-03 02:49:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:58,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:58,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:58,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:58,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:49:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:49:58,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:58,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887501978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:58,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:58,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:49:58,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379556098] [2022-11-03 02:49:58,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:58,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:58,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:58,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:58,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:58,410 INFO L87 Difference]: Start difference. First operand 4211 states and 7145 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:49:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:59,157 INFO L93 Difference]: Finished difference Result 9292 states and 15002 transitions. [2022-11-03 02:49:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 02:49:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:59,196 INFO L225 Difference]: With dead ends: 9292 [2022-11-03 02:49:59,197 INFO L226 Difference]: Without dead ends: 6727 [2022-11-03 02:49:59,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:59,214 INFO L413 NwaCegarLoop]: 3337 mSDtfsCounter, 3515 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:59,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3554 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:49:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2022-11-03 02:49:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2022-11-03 02:49:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5899 states have (on average 1.6367180878114935) internal successors, (9655), 5918 states have internal predecessors, (9655), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-03 02:49:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10881 transitions. [2022-11-03 02:49:59,548 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10881 transitions. Word has length 130 [2022-11-03 02:49:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:59,548 INFO L495 AbstractCegarLoop]: Abstraction has 6707 states and 10881 transitions. [2022-11-03 02:49:59,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:49:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10881 transitions. [2022-11-03 02:49:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:49:59,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:59,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:59,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:59,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash 456993247, now seen corresponding path program 1 times [2022-11-03 02:49:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:59,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579285367] [2022-11-03 02:49:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:50:00,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:00,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579285367] [2022-11-03 02:50:00,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579285367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:00,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934389553] [2022-11-03 02:50:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:00,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:00,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:00,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:00,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:50:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:50:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:50:00,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:00,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934389553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:00,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:00,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:50:00,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779380817] [2022-11-03 02:50:00,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:00,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:00,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:00,334 INFO L87 Difference]: Start difference. First operand 6707 states and 10881 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:50:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:01,609 INFO L93 Difference]: Finished difference Result 16732 states and 26314 transitions. [2022-11-03 02:50:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 02:50:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:01,719 INFO L225 Difference]: With dead ends: 16732 [2022-11-03 02:50:01,720 INFO L226 Difference]: Without dead ends: 11671 [2022-11-03 02:50:01,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:01,756 INFO L413 NwaCegarLoop]: 3336 mSDtfsCounter, 3518 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:01,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3518 Valid, 3553 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:50:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2022-11-03 02:50:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11635. [2022-11-03 02:50:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 10059 states have (on average 1.575405109851874) internal successors, (15847), 10094 states have internal predecessors, (15847), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-03 02:50:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 18225 transitions. [2022-11-03 02:50:02,539 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 18225 transitions. Word has length 130 [2022-11-03 02:50:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:02,540 INFO L495 AbstractCegarLoop]: Abstraction has 11635 states and 18225 transitions. [2022-11-03 02:50:02,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:50:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 18225 transitions. [2022-11-03 02:50:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:50:02,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:02,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:02,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:02,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:02,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash 442287905, now seen corresponding path program 1 times [2022-11-03 02:50:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588457919] [2022-11-03 02:50:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:02,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:50:03,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:03,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588457919] [2022-11-03 02:50:03,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588457919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:03,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191921754] [2022-11-03 02:50:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:03,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:03,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:03,037 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:03,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:50:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:50:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:50:03,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:03,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191921754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:03,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:03,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:50:03,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890348268] [2022-11-03 02:50:03,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:03,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:03,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:03,377 INFO L87 Difference]: Start difference. First operand 11635 states and 18225 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:50:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:04,729 INFO L93 Difference]: Finished difference Result 31420 states and 48538 transitions. [2022-11-03 02:50:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 02:50:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:04,815 INFO L225 Difference]: With dead ends: 31420 [2022-11-03 02:50:04,816 INFO L226 Difference]: Without dead ends: 21431 [2022-11-03 02:50:04,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:04,853 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3503 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:04,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:50:04,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21431 states. [2022-11-03 02:50:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21431 to 21363. [2022-11-03 02:50:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21363 states, 18283 states have (on average 1.53361045780233) internal successors, (28039), 18350 states have internal predecessors, (28039), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-03 02:50:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21363 states to 21363 states and 32657 transitions. [2022-11-03 02:50:05,922 INFO L78 Accepts]: Start accepts. Automaton has 21363 states and 32657 transitions. Word has length 130 [2022-11-03 02:50:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:05,923 INFO L495 AbstractCegarLoop]: Abstraction has 21363 states and 32657 transitions. [2022-11-03 02:50:05,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:50:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 21363 states and 32657 transitions. [2022-11-03 02:50:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:50:05,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:05,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:06,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:06,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d23717a-2428-40b8-9e80-49c7ea0f6948/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:06,195 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:06,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1592954399, now seen corresponding path program 1 times [2022-11-03 02:50:06,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:06,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558643307] [2022-11-03 02:50:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:06,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:50:06,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558643307] [2022-11-03 02:50:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558643307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:06,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:06,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:50:06,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611427293] [2022-11-03 02:50:06,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:06,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:50:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:50:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:06,938 INFO L87 Difference]: Start difference. First operand 21363 states and 32657 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:50:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:09,635 INFO L93 Difference]: Finished difference Result 55355 states and 83479 transitions. [2022-11-03 02:50:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:50:09,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-03 02:50:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:09,828 INFO L225 Difference]: With dead ends: 55355 [2022-11-03 02:50:09,829 INFO L226 Difference]: Without dead ends: 35639 [2022-11-03 02:50:09,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:09,901 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 4170 mSDsluCounter, 7144 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4176 SdHoareTripleChecker+Valid, 9953 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:09,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4176 Valid, 9953 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:50:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35639 states. [2022-11-03 02:50:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35639 to 30963. [2022-11-03 02:50:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30963 states, 26379 states have (on average 1.5154099852155123) internal successors, (39975), 26478 states have internal predecessors, (39975), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2022-11-03 02:50:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30963 states to 30963 states and 46833 transitions. [2022-11-03 02:50:12,250 INFO L78 Accepts]: Start accepts. Automaton has 30963 states and 46833 transitions. Word has length 130 [2022-11-03 02:50:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:12,251 INFO L495 AbstractCegarLoop]: Abstraction has 30963 states and 46833 transitions. [2022-11-03 02:50:12,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:50:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 30963 states and 46833 transitions. [2022-11-03 02:50:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:50:12,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:12,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:50:12,321 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash 713851042, now seen corresponding path program 1 times [2022-11-03 02:50:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952952107] [2022-11-03 02:50:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:12,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:50:13,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952952107] [2022-11-03 02:50:13,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952952107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:13,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:13,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:50:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163465415] [2022-11-03 02:50:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:50:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:13,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:50:13,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:13,120 INFO L87 Difference]: Start difference. First operand 30963 states and 46833 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:50:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:17,715 INFO L93 Difference]: Finished difference Result 99579 states and 149272 transitions. [2022-11-03 02:50:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:50:17,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-11-03 02:50:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:18,058 INFO L225 Difference]: With dead ends: 99579 [2022-11-03 02:50:18,058 INFO L226 Difference]: Without dead ends: 70263 [2022-11-03 02:50:18,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:18,158 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 4169 mSDsluCounter, 10470 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4189 SdHoareTripleChecker+Valid, 13030 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:18,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4189 Valid, 13030 Invalid, 1362 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [156 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:50:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70263 states. [2022-11-03 02:50:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70263 to 59123. [2022-11-03 02:50:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59123 states, 50155 states have (on average 1.494387399062905) internal successors, (74951), 50350 states have internal predecessors, (74951), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2022-11-03 02:50:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59123 states to 59123 states and 88273 transitions. [2022-11-03 02:50:21,790 INFO L78 Accepts]: Start accepts. Automaton has 59123 states and 88273 transitions. Word has length 131 [2022-11-03 02:50:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:21,792 INFO L495 AbstractCegarLoop]: Abstraction has 59123 states and 88273 transitions. [2022-11-03 02:50:21,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:50:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 59123 states and 88273 transitions. [2022-11-03 02:50:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:50:21,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:21,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:21,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:50:21,878 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:21,878 INFO L85 PathProgramCache]: Analyzing trace with hash 963644927, now seen corresponding path program 1 times [2022-11-03 02:50:21,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:21,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715972071] [2022-11-03 02:50:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:21,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:50:22,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:22,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715972071] [2022-11-03 02:50:22,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715972071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:22,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:22,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:50:22,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812756529] [2022-11-03 02:50:22,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:22,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:50:22,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:50:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:22,788 INFO L87 Difference]: Start difference. First operand 59123 states and 88273 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:50:31,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:31,743 INFO L93 Difference]: Finished difference Result 202619 states and 300632 transitions. [2022-11-03 02:50:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:50:31,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2022-11-03 02:50:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:32,487 INFO L225 Difference]: With dead ends: 202619 [2022-11-03 02:50:32,488 INFO L226 Difference]: Without dead ends: 145143 [2022-11-03 02:50:32,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:32,683 INFO L413 NwaCegarLoop]: 3303 mSDtfsCounter, 4328 mSDsluCounter, 7056 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 9848 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:32,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4348 Valid, 9848 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:50:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145143 states.