./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba --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 161f5eab054e94dd2ff7a7c46df9e7154542593f1f9d4de13027218e1f7c6216 --- 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-b5237d8 [2022-11-22 02:06:26,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:06:26,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:06:26,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:06:26,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:06:26,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:06:26,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:06:26,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:06:26,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:06:26,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:06:26,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:06:26,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:06:26,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:06:26,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:06:26,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:06:26,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:06:26,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:06:26,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:06:26,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:06:26,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:06:26,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:06:26,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:06:26,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:06:26,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:06:26,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:06:26,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:06:26,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:06:26,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:06:26,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:06:26,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:06:26,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:06:26,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:06:26,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:06:26,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:06:26,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:06:26,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:06:26,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:06:26,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:06:26,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:06:26,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:06:26,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:06:26,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:06:26,826 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:06:26,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:06:26,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:06:26,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:06:26,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:06:26,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:06:26,829 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:06:26,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:06:26,830 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:06:26,830 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:06:26,831 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:06:26,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:06:26,831 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:06:26,832 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:06:26,832 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:06:26,832 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:06:26,833 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:06:26,833 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:06:26,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:06:26,834 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:06:26,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:06:26,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:06:26,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:06:26,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:06:26,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:06:26,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:06:26,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:06:26,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:06:26,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:06:26,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:06:26,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:06:26,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:06:26,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:06:26,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:06:26,839 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:06:26,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:06:26,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:06:26,840 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:06:26,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:06:26,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:06:26,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:06:26,841 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_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 161f5eab054e94dd2ff7a7c46df9e7154542593f1f9d4de13027218e1f7c6216 [2022-11-22 02:06:27,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:06:27,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:06:27,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:06:27,222 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:06:27,223 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:06:27,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c [2022-11-22 02:06:30,555 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:06:31,282 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:06:31,283 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c [2022-11-22 02:06:31,343 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/data/7b3bba397/96a48bfeab75414eb50084b61b4ed2d5/FLAGcf1d4668f [2022-11-22 02:06:31,363 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/data/7b3bba397/96a48bfeab75414eb50084b61b4ed2d5 [2022-11-22 02:06:31,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:06:31,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:06:31,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:06:31,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:06:31,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:06:31,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:06:31" (1/1) ... [2022-11-22 02:06:31,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3dbfb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:31, skipping insertion in model container [2022-11-22 02:06:31,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:06:31" (1/1) ... [2022-11-22 02:06:31,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:06:31,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:06:34,547 WARN L237 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_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[381679,381692] [2022-11-22 02:06:34,585 WARN L237 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_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[383339,383352] [2022-11-22 02:06:34,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:06:34,807 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:06:36,189 WARN L237 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_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[381679,381692] [2022-11-22 02:06:36,194 WARN L237 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_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[383339,383352] [2022-11-22 02:06:36,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:06:36,373 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:06:36,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36 WrapperNode [2022-11-22 02:06:36,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:06:36,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:06:36,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:06:36,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:06:36,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:36,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,003 INFO L138 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2022-11-22 02:06:37,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:06:37,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:06:37,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:06:37,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:06:37,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,536 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:06:37,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:06:37,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:06:37,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:06:37,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (1/1) ... [2022-11-22 02:06:37,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:06:37,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:06:37,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:06:37,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:06:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:06:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 02:06:37,903 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 02:06:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 02:06:37,903 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 02:06:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 02:06:37,903 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 02:06:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 02:06:37,904 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 02:06:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 02:06:37,904 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 02:06:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 02:06:37,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 02:06:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:06:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:06:37,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:06:38,096 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:06:38,098 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:06:48,904 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:06:51,882 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:06:51,882 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-22 02:06:51,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:06:51 BoogieIcfgContainer [2022-11-22 02:06:51,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:06:51,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:06:51,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:06:51,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:06:51,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:06:31" (1/3) ... [2022-11-22 02:06:51,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497f2750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:06:51, skipping insertion in model container [2022-11-22 02:06:51,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:06:36" (2/3) ... [2022-11-22 02:06:51,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497f2750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:06:51, skipping insertion in model container [2022-11-22 02:06:51,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:06:51" (3/3) ... [2022-11-22 02:06:51,898 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.03.cil-2.c [2022-11-22 02:06:51,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:06:51,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 02:06:52,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:06:52,040 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;@23120129, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:06:52,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 02:06:52,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 1732 states, 1706 states have (on average 1.9747948417350527) internal successors, (3369), 1709 states have internal predecessors, (3369), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-22 02:06:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:06:52,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:52,068 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] [2022-11-22 02:06:52,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:06:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -796407589, now seen corresponding path program 1 times [2022-11-22 02:06:52,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:06:52,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031753933] [2022-11-22 02:06:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:06:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:06:52,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:06:52,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031753933] [2022-11-22 02:06:52,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031753933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:06:52,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:06:52,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:06:52,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567862149] [2022-11-22 02:06:52,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:06:52,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:06:52,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:06:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:06:52,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:06:52,602 INFO L87 Difference]: Start difference. First operand has 1732 states, 1706 states have (on average 1.9747948417350527) internal successors, (3369), 1709 states have internal predecessors, (3369), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:06:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:53,833 INFO L93 Difference]: Finished difference Result 3536 states and 6923 transitions. [2022-11-22 02:06:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:06:53,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-22 02:06:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:53,857 INFO L225 Difference]: With dead ends: 3536 [2022-11-22 02:06:53,858 INFO L226 Difference]: Without dead ends: 1803 [2022-11-22 02:06:53,869 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 [2022-11-22 02:06:53,876 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3482 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 6420 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:53,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 6420 Invalid, 596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:06:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-11-22 02:06:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1802. [2022-11-22 02:06:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1758 states have (on average 1.9522184300341296) internal successors, (3432), 1761 states have internal predecessors, (3432), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 02:06:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 3492 transitions. [2022-11-22 02:06:54,034 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 3492 transitions. Word has length 40 [2022-11-22 02:06:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:06:54,035 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 3492 transitions. [2022-11-22 02:06:54,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:06:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 3492 transitions. [2022-11-22 02:06:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:06:54,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:54,040 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:06:54,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:06:54,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:06:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:54,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1784117270, now seen corresponding path program 1 times [2022-11-22 02:06:54,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:06:54,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694792916] [2022-11-22 02:06:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:54,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:06:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:06:54,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:06:54,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694792916] [2022-11-22 02:06:54,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694792916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:06:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556292914] [2022-11-22 02:06:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:54,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:06:54,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:06:54,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:06:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:06:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:06:54,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:06:54,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556292914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:06:54,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:06:54,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:06:54,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517911629] [2022-11-22 02:06:54,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:06:54,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:06:54,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:06:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:06:54,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:06:54,644 INFO L87 Difference]: Start difference. First operand 1802 states and 3492 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:06:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:55,308 INFO L93 Difference]: Finished difference Result 2107 states and 3925 transitions. [2022-11-22 02:06:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:06:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-22 02:06:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:55,323 INFO L225 Difference]: With dead ends: 2107 [2022-11-22 02:06:55,324 INFO L226 Difference]: Without dead ends: 1951 [2022-11-22 02:06:55,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:06:55,327 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3363 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3363 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:55,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3363 Valid, 3280 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:06:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-22 02:06:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1947. [2022-11-22 02:06:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1867 states have (on average 1.9180503481521156) internal successors, (3581), 1871 states have internal predecessors, (3581), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-22 02:06:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 3689 transitions. [2022-11-22 02:06:55,396 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 3689 transitions. Word has length 73 [2022-11-22 02:06:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:06:55,396 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 3689 transitions. [2022-11-22 02:06:55,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:06:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 3689 transitions. [2022-11-22 02:06:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:06:55,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:55,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:06:55,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:55,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:55,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:06:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1277914836, now seen corresponding path program 1 times [2022-11-22 02:06:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:06:55,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215279355] [2022-11-22 02:06:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:06:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:06:55,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:06:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215279355] [2022-11-22 02:06:55,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215279355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:06:55,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021986075] [2022-11-22 02:06:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:55,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:55,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:06:55,766 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:06:55,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:06:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:55,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:06:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:06:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:06:56,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:06:56,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021986075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:06:56,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:06:56,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:06:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560134396] [2022-11-22 02:06:56,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:06:56,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:06:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:06:56,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:06:56,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:06:56,013 INFO L87 Difference]: Start difference. First operand 1947 states and 3689 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:06:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:56,599 INFO L93 Difference]: Finished difference Result 2536 states and 4516 transitions. [2022-11-22 02:06:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:06:56,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-22 02:06:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:56,612 INFO L225 Difference]: With dead ends: 2536 [2022-11-22 02:06:56,613 INFO L226 Difference]: Without dead ends: 2235 [2022-11-22 02:06:56,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:06:56,618 INFO L413 NwaCegarLoop]: 3166 mSDtfsCounter, 3366 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:56,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 3256 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:06:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-11-22 02:06:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2229. [2022-11-22 02:06:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2079 states have (on average 1.86002886002886) internal successors, (3867), 2085 states have internal predecessors, (3867), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-22 02:06:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4067 transitions. [2022-11-22 02:06:56,715 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4067 transitions. Word has length 73 [2022-11-22 02:06:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:06:56,715 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4067 transitions. [2022-11-22 02:06:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:06:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4067 transitions. [2022-11-22 02:06:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:06:56,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:56,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:06:56,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:06:56,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:06:56,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:06:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash -631379798, now seen corresponding path program 1 times [2022-11-22 02:06:56,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:06:56,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289941904] [2022-11-22 02:06:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:06:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:06:57,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:06:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289941904] [2022-11-22 02:06:57,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289941904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:06:57,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:06:57,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:06:57,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002929433] [2022-11-22 02:06:57,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:06:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:06:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:06:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:06:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:06:57,477 INFO L87 Difference]: Start difference. First operand 2229 states and 4067 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:06:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:58,718 INFO L93 Difference]: Finished difference Result 3505 states and 5806 transitions. [2022-11-22 02:06:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:06:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-22 02:06:58,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:58,740 INFO L225 Difference]: With dead ends: 3505 [2022-11-22 02:06:58,740 INFO L226 Difference]: Without dead ends: 2923 [2022-11-22 02:06:58,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:06:58,749 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 3590 mSDsluCounter, 9386 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 12559 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:58,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3602 Valid, 12559 Invalid, 1146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [87 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:06:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-11-22 02:06:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2761. [2022-11-22 02:06:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2475 states have (on average 1.7741414141414142) internal successors, (4391), 2485 states have internal predecessors, (4391), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-22 02:06:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 4767 transitions. [2022-11-22 02:06:58,928 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 4767 transitions. Word has length 73 [2022-11-22 02:06:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:06:58,929 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 4767 transitions. [2022-11-22 02:06:58,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:06:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 4767 transitions. [2022-11-22 02:06:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 02:06:58,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:06:58,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:06:58,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:06:58,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:06:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:06:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1767338329, now seen corresponding path program 1 times [2022-11-22 02:06:58,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:06:58,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470680405] [2022-11-22 02:06:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:06:58,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:06:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:06:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:06:59,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:06:59,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470680405] [2022-11-22 02:06:59,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470680405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:06:59,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:06:59,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:06:59,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188030223] [2022-11-22 02:06:59,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:06:59,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:06:59,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:06:59,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:06:59,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:06:59,042 INFO L87 Difference]: Start difference. First operand 2761 states and 4767 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:06:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:06:59,951 INFO L93 Difference]: Finished difference Result 3622 states and 5946 transitions. [2022-11-22 02:06:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:06:59,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-22 02:06:59,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:06:59,969 INFO L225 Difference]: With dead ends: 3622 [2022-11-22 02:06:59,970 INFO L226 Difference]: Without dead ends: 3044 [2022-11-22 02:06:59,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:06:59,974 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 45 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6362 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:06:59,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6362 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:06:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-22 02:07:00,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2913. [2022-11-22 02:07:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2611 states have (on average 1.7644580620451935) internal successors, (4607), 2621 states have internal predecessors, (4607), 196 states have call successors, (196), 104 states have call predecessors, (196), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2022-11-22 02:07:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 4999 transitions. [2022-11-22 02:07:00,181 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 4999 transitions. Word has length 74 [2022-11-22 02:07:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:00,182 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 4999 transitions. [2022-11-22 02:07:00,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:07:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 4999 transitions. [2022-11-22 02:07:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-22 02:07:00,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:00,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:07:00,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:07:00,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash 198799535, now seen corresponding path program 1 times [2022-11-22 02:07:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:00,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511058009] [2022-11-22 02:07:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:00,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 02:07:00,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:00,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511058009] [2022-11-22 02:07:00,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511058009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:00,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:00,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:07:00,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231509880] [2022-11-22 02:07:00,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:00,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:00,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:07:00,324 INFO L87 Difference]: Start difference. First operand 2913 states and 4999 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:07:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:01,089 INFO L93 Difference]: Finished difference Result 4810 states and 7608 transitions. [2022-11-22 02:07:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:01,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-11-22 02:07:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:01,111 INFO L225 Difference]: With dead ends: 4810 [2022-11-22 02:07:01,111 INFO L226 Difference]: Without dead ends: 3543 [2022-11-22 02:07:01,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:07:01,118 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3359 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:01,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3280 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:07:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-11-22 02:07:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3529. [2022-11-22 02:07:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3083 states have (on average 1.6980214077197535) internal successors, (5235), 3097 states have internal predecessors, (5235), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-22 02:07:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 5811 transitions. [2022-11-22 02:07:01,367 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 5811 transitions. Word has length 96 [2022-11-22 02:07:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:01,368 INFO L495 AbstractCegarLoop]: Abstraction has 3529 states and 5811 transitions. [2022-11-22 02:07:01,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:07:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 5811 transitions. [2022-11-22 02:07:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 02:07:01,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:01,377 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:01,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:07:01,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:01,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1421069330, now seen corresponding path program 1 times [2022-11-22 02:07:01,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:01,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071487896] [2022-11-22 02:07:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:01,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-22 02:07:01,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:01,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071487896] [2022-11-22 02:07:01,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071487896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:01,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973533018] [2022-11-22 02:07:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:01,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:01,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:01,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:01,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:07:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:01,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:07:01,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:07:01,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:01,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973533018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:01,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:01,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-22 02:07:01,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851662279] [2022-11-22 02:07:01,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:01,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:01,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:01,794 INFO L87 Difference]: Start difference. First operand 3529 states and 5811 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:02,647 INFO L93 Difference]: Finished difference Result 5197 states and 8113 transitions. [2022-11-22 02:07:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:02,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-22 02:07:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:02,671 INFO L225 Difference]: With dead ends: 5197 [2022-11-22 02:07:02,671 INFO L226 Difference]: Without dead ends: 3931 [2022-11-22 02:07:02,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:02,678 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 53 mSDsluCounter, 3160 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:02,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 6364 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:07:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2022-11-22 02:07:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3741. [2022-11-22 02:07:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3271 states have (on average 1.6921430755120759) internal successors, (5535), 3285 states have internal predecessors, (5535), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-22 02:07:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 6135 transitions. [2022-11-22 02:07:03,019 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 6135 transitions. Word has length 109 [2022-11-22 02:07:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:03,020 INFO L495 AbstractCegarLoop]: Abstraction has 3741 states and 6135 transitions. [2022-11-22 02:07:03,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 6135 transitions. [2022-11-22 02:07:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 02:07:03,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:03,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:03,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:03,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:07:03,236 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1778946018, now seen corresponding path program 2 times [2022-11-22 02:07:03,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:03,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940365392] [2022-11-22 02:07:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:03,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:07:03,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940365392] [2022-11-22 02:07:03,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940365392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:03,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120938753] [2022-11-22 02:07:03,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:07:03,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:03,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:03,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:03,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:07:03,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:07:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:07:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:07:03,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:03,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120938753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:03,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:03,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 02:07:03,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594703550] [2022-11-22 02:07:03,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:03,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:03,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:03,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:03,739 INFO L87 Difference]: Start difference. First operand 3741 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:04,491 INFO L93 Difference]: Finished difference Result 5229 states and 8277 transitions. [2022-11-22 02:07:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-22 02:07:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:04,539 INFO L225 Difference]: With dead ends: 5229 [2022-11-22 02:07:04,541 INFO L226 Difference]: Without dead ends: 3751 [2022-11-22 02:07:04,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:04,549 INFO L413 NwaCegarLoop]: 3217 mSDtfsCounter, 102 mSDsluCounter, 3147 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:04,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6364 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:07:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-11-22 02:07:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 3733. [2022-11-22 02:07:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3263 states have (on average 1.681581366840331) internal successors, (5487), 3277 states have internal predecessors, (5487), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-22 02:07:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 6087 transitions. [2022-11-22 02:07:04,761 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 6087 transitions. Word has length 109 [2022-11-22 02:07:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:04,763 INFO L495 AbstractCegarLoop]: Abstraction has 3733 states and 6087 transitions. [2022-11-22 02:07:04,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 6087 transitions. [2022-11-22 02:07:04,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 02:07:04,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:04,773 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:04,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:04,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:04,980 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -768938784, now seen corresponding path program 1 times [2022-11-22 02:07:04,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:04,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118228430] [2022-11-22 02:07:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:04,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:07:05,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:05,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118228430] [2022-11-22 02:07:05,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118228430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:05,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124868718] [2022-11-22 02:07:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:05,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:05,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:05,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:05,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:07:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:07:05,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 02:07:05,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:05,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124868718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:05,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:05,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 02:07:05,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469963123] [2022-11-22 02:07:05,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:05,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:05,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:05,511 INFO L87 Difference]: Start difference. First operand 3733 states and 6087 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:06,283 INFO L93 Difference]: Finished difference Result 5579 states and 8550 transitions. [2022-11-22 02:07:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:06,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-22 02:07:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:06,298 INFO L225 Difference]: With dead ends: 5579 [2022-11-22 02:07:06,298 INFO L226 Difference]: Without dead ends: 4181 [2022-11-22 02:07:06,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:06,307 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3369 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3369 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:06,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3369 Valid, 3191 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:07:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-11-22 02:07:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4181. [2022-11-22 02:07:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 3647 states have (on average 1.6262681656155744) internal successors, (5931), 3661 states have internal predecessors, (5931), 320 states have call successors, (320), 212 states have call predecessors, (320), 212 states have return successors, (320), 308 states have call predecessors, (320), 320 states have call successors, (320) [2022-11-22 02:07:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 6571 transitions. [2022-11-22 02:07:06,556 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 6571 transitions. Word has length 109 [2022-11-22 02:07:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:06,557 INFO L495 AbstractCegarLoop]: Abstraction has 4181 states and 6571 transitions. [2022-11-22 02:07:06,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 6571 transitions. [2022-11-22 02:07:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-22 02:07:06,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:06,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:06,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:06,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:06,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash 64527455, now seen corresponding path program 1 times [2022-11-22 02:07:06,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:06,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154124921] [2022-11-22 02:07:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:07:07,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154124921] [2022-11-22 02:07:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154124921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648415369] [2022-11-22 02:07:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:07,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:07,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:07,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:07,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:07:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:07,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:07:07,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:07,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648415369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:07,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:07,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 02:07:07,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783558500] [2022-11-22 02:07:07,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:07,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:07,282 INFO L87 Difference]: Start difference. First operand 4181 states and 6571 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:08,155 INFO L93 Difference]: Finished difference Result 7683 states and 11232 transitions. [2022-11-22 02:07:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-11-22 02:07:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:08,175 INFO L225 Difference]: With dead ends: 7683 [2022-11-22 02:07:08,175 INFO L226 Difference]: Without dead ends: 5149 [2022-11-22 02:07:08,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:08,185 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 49 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:08,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 6326 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:07:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2022-11-22 02:07:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 4477. [2022-11-22 02:07:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 3907 states have (on average 1.6204248784233428) internal successors, (6331), 3922 states have internal predecessors, (6331), 338 states have call successors, (338), 230 states have call predecessors, (338), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2022-11-22 02:07:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 7007 transitions. [2022-11-22 02:07:08,491 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 7007 transitions. Word has length 110 [2022-11-22 02:07:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:08,492 INFO L495 AbstractCegarLoop]: Abstraction has 4477 states and 7007 transitions. [2022-11-22 02:07:08,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 7007 transitions. [2022-11-22 02:07:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-22 02:07:08,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:08,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:08,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:08,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:07:08,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1391683135, now seen corresponding path program 1 times [2022-11-22 02:07:08,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:08,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437584262] [2022-11-22 02:07:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:08,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-22 02:07:08,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:08,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437584262] [2022-11-22 02:07:08,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437584262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:08,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293328676] [2022-11-22 02:07:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:08,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:08,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:08,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:08,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:07:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:09,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:07:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:07:09,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:09,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293328676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:09,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:09,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-22 02:07:09,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692154484] [2022-11-22 02:07:09,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:09,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:09,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:09,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:09,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:09,128 INFO L87 Difference]: Start difference. First operand 4477 states and 7007 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:10,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:10,004 INFO L93 Difference]: Finished difference Result 6987 states and 10395 transitions. [2022-11-22 02:07:10,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:10,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-22 02:07:10,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:10,026 INFO L225 Difference]: With dead ends: 6987 [2022-11-22 02:07:10,026 INFO L226 Difference]: Without dead ends: 5529 [2022-11-22 02:07:10,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:10,034 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 63 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:10,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 6380 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:07:10,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2022-11-22 02:07:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 4957. [2022-11-22 02:07:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4323 states have (on average 1.6069858894286375) internal successors, (6947), 4338 states have internal predecessors, (6947), 370 states have call successors, (370), 262 states have call predecessors, (370), 262 states have return successors, (370), 357 states have call predecessors, (370), 370 states have call successors, (370) [2022-11-22 02:07:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 7687 transitions. [2022-11-22 02:07:10,481 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 7687 transitions. Word has length 111 [2022-11-22 02:07:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:10,482 INFO L495 AbstractCegarLoop]: Abstraction has 4957 states and 7687 transitions. [2022-11-22 02:07:10,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 7687 transitions. [2022-11-22 02:07:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-22 02:07:10,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:10,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:10,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:10,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:07:10,700 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:10,701 INFO L85 PathProgramCache]: Analyzing trace with hash 879491531, now seen corresponding path program 1 times [2022-11-22 02:07:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:10,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371699835] [2022-11-22 02:07:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:10,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-22 02:07:10,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:10,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371699835] [2022-11-22 02:07:10,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371699835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:10,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209941213] [2022-11-22 02:07:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:10,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:10,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:10,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:10,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:07:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:07:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:07:11,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209941213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:11,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:11,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-22 02:07:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877738982] [2022-11-22 02:07:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:11,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:11,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:11,085 INFO L87 Difference]: Start difference. First operand 4957 states and 7687 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:12,022 INFO L93 Difference]: Finished difference Result 7815 states and 11567 transitions. [2022-11-22 02:07:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:12,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-22 02:07:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:12,047 INFO L225 Difference]: With dead ends: 7815 [2022-11-22 02:07:12,047 INFO L226 Difference]: Without dead ends: 6109 [2022-11-22 02:07:12,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:12,055 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 57 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6375 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:12,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6375 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:07:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2022-11-22 02:07:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 5621. [2022-11-22 02:07:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 4891 states have (on average 1.5863831527295031) internal successors, (7759), 4906 states have internal predecessors, (7759), 418 states have call successors, (418), 310 states have call predecessors, (418), 310 states have return successors, (418), 405 states have call predecessors, (418), 418 states have call successors, (418) [2022-11-22 02:07:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 8595 transitions. [2022-11-22 02:07:12,465 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 8595 transitions. Word has length 111 [2022-11-22 02:07:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:12,466 INFO L495 AbstractCegarLoop]: Abstraction has 5621 states and 8595 transitions. [2022-11-22 02:07:12,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 8595 transitions. [2022-11-22 02:07:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-22 02:07:12,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:12,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:12,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:12,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:12,686 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:12,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1545644936, now seen corresponding path program 1 times [2022-11-22 02:07:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:12,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299221660] [2022-11-22 02:07:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:12,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:07:12,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:12,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299221660] [2022-11-22 02:07:12,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299221660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:12,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572410089] [2022-11-22 02:07:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:12,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:12,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:12,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:12,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:07:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:07:13,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:07:13,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:13,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572410089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:13,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:13,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-22 02:07:13,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199690515] [2022-11-22 02:07:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:07:13,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:07:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:13,300 INFO L87 Difference]: Start difference. First operand 5621 states and 8595 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:07:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:14,921 INFO L93 Difference]: Finished difference Result 11073 states and 15837 transitions. [2022-11-22 02:07:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:07:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-22 02:07:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:14,955 INFO L225 Difference]: With dead ends: 11073 [2022-11-22 02:07:14,955 INFO L226 Difference]: Without dead ends: 7099 [2022-11-22 02:07:14,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:07:14,965 INFO L413 NwaCegarLoop]: 3166 mSDtfsCounter, 3560 mSDsluCounter, 6270 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3572 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:14,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3572 Valid, 9436 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:07:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-11-22 02:07:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 7097. [2022-11-22 02:07:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 6065 states have (on average 1.523330585325639) internal successors, (9239), 6086 states have internal predecessors, (9239), 592 states have call successors, (592), 438 states have call predecessors, (592), 438 states have return successors, (592), 573 states have call predecessors, (592), 592 states have call successors, (592) [2022-11-22 02:07:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 10423 transitions. [2022-11-22 02:07:15,829 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 10423 transitions. Word has length 111 [2022-11-22 02:07:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:15,830 INFO L495 AbstractCegarLoop]: Abstraction has 7097 states and 10423 transitions. [2022-11-22 02:07:15,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:07:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 10423 transitions. [2022-11-22 02:07:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-22 02:07:15,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:15,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:15,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:16,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:16,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:16,059 INFO L85 PathProgramCache]: Analyzing trace with hash -489601717, now seen corresponding path program 1 times [2022-11-22 02:07:16,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:16,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860928675] [2022-11-22 02:07:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:16,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-22 02:07:16,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860928675] [2022-11-22 02:07:16,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860928675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312787454] [2022-11-22 02:07:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:16,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:16,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:16,403 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:16,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:07:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:07:16,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:07:16,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312787454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:16,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:16,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-22 02:07:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650346991] [2022-11-22 02:07:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:16,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:07:16,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:07:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:16,747 INFO L87 Difference]: Start difference. First operand 7097 states and 10423 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:07:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:18,533 INFO L93 Difference]: Finished difference Result 14609 states and 20208 transitions. [2022-11-22 02:07:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:07:18,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-22 02:07:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:18,572 INFO L225 Difference]: With dead ends: 14609 [2022-11-22 02:07:18,572 INFO L226 Difference]: Without dead ends: 9159 [2022-11-22 02:07:18,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:07:18,587 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 6897 mSDsluCounter, 6224 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6909 SdHoareTripleChecker+Valid, 9382 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:18,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6909 Valid, 9382 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:07:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9159 states. [2022-11-22 02:07:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9159 to 9157. [2022-11-22 02:07:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 7695 states have (on average 1.462508122157245) internal successors, (11254), 7725 states have internal predecessors, (11254), 840 states have call successors, (840), 620 states have call predecessors, (840), 620 states have return successors, (840), 812 states have call predecessors, (840), 840 states have call successors, (840) [2022-11-22 02:07:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 12934 transitions. [2022-11-22 02:07:19,539 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 12934 transitions. Word has length 112 [2022-11-22 02:07:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:19,540 INFO L495 AbstractCegarLoop]: Abstraction has 9157 states and 12934 transitions. [2022-11-22 02:07:19,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:07:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 12934 transitions. [2022-11-22 02:07:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 02:07:19,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:19,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:19,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:19,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:07:19,765 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:19,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1355595544, now seen corresponding path program 1 times [2022-11-22 02:07:19,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:19,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180247312] [2022-11-22 02:07:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:19,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:07:19,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180247312] [2022-11-22 02:07:19,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180247312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525008891] [2022-11-22 02:07:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:19,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:19,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:19,962 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:19,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:07:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:20,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:07:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:07:20,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:20,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525008891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:20,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:20,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-22 02:07:20,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057762728] [2022-11-22 02:07:20,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:20,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:07:20,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:07:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:20,218 INFO L87 Difference]: Start difference. First operand 9157 states and 12934 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 02:07:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:21,691 INFO L93 Difference]: Finished difference Result 12316 states and 17008 transitions. [2022-11-22 02:07:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-22 02:07:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:21,730 INFO L225 Difference]: With dead ends: 12316 [2022-11-22 02:07:21,731 INFO L226 Difference]: Without dead ends: 9627 [2022-11-22 02:07:21,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:07:21,742 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3373 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3373 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:21,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3373 Valid, 6522 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:07:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2022-11-22 02:07:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 9399. [2022-11-22 02:07:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 7890 states have (on average 1.4574144486692016) internal successors, (11499), 7938 states have internal predecessors, (11499), 847 states have call successors, (847), 624 states have call predecessors, (847), 660 states have return successors, (883), 837 states have call predecessors, (883), 847 states have call successors, (883) [2022-11-22 02:07:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 13229 transitions. [2022-11-22 02:07:22,456 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 13229 transitions. Word has length 116 [2022-11-22 02:07:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:22,457 INFO L495 AbstractCegarLoop]: Abstraction has 9399 states and 13229 transitions. [2022-11-22 02:07:22,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 02:07:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 13229 transitions. [2022-11-22 02:07:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 02:07:22,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:22,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:22,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 02:07:22,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:07:22,684 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash -253546937, now seen corresponding path program 1 times [2022-11-22 02:07:22,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:22,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297796947] [2022-11-22 02:07:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:22,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:07:22,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:22,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297796947] [2022-11-22 02:07:22,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297796947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294771828] [2022-11-22 02:07:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:22,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:22,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:22,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:22,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:07:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 02:07:22,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:22,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294771828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:22,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:22,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-22 02:07:22,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819658146] [2022-11-22 02:07:22,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:22,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:22,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:07:22,996 INFO L87 Difference]: Start difference. First operand 9399 states and 13229 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:24,142 INFO L93 Difference]: Finished difference Result 12154 states and 16848 transitions. [2022-11-22 02:07:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:24,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-22 02:07:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:24,178 INFO L225 Difference]: With dead ends: 12154 [2022-11-22 02:07:24,178 INFO L226 Difference]: Without dead ends: 9141 [2022-11-22 02:07:24,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:07:24,189 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 22 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6321 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:24,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6321 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:07:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9141 states. [2022-11-22 02:07:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9141 to 8730. [2022-11-22 02:07:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 7329 states have (on average 1.4719607040523945) internal successors, (10788), 7350 states have internal predecessors, (10788), 811 states have call successors, (811), 588 states have call predecessors, (811), 588 states have return successors, (811), 792 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-22 02:07:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 12410 transitions. [2022-11-22 02:07:24,941 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 12410 transitions. Word has length 117 [2022-11-22 02:07:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:24,942 INFO L495 AbstractCegarLoop]: Abstraction has 8730 states and 12410 transitions. [2022-11-22 02:07:24,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:24,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 12410 transitions. [2022-11-22 02:07:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 02:07:24,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:24,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:24,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:25,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:25,172 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:25,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:25,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1535248258, now seen corresponding path program 1 times [2022-11-22 02:07:25,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:25,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425709165] [2022-11-22 02:07:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:25,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:07:25,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425709165] [2022-11-22 02:07:25,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425709165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:25,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349072211] [2022-11-22 02:07:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:25,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:25,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:25,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:25,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:07:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:07:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:07:25,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:25,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349072211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:25,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:25,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-22 02:07:25,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919547944] [2022-11-22 02:07:25,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:25,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:25,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:25,616 INFO L87 Difference]: Start difference. First operand 8730 states and 12410 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:26,816 INFO L93 Difference]: Finished difference Result 14729 states and 20254 transitions. [2022-11-22 02:07:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:26,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-22 02:07:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:26,854 INFO L225 Difference]: With dead ends: 14729 [2022-11-22 02:07:26,854 INFO L226 Difference]: Without dead ends: 9757 [2022-11-22 02:07:26,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:26,867 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3344 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3344 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:26,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3344 Valid, 3207 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:07:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2022-11-22 02:07:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 9665. [2022-11-22 02:07:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9665 states, 8189 states have (on average 1.4359506655269263) internal successors, (11759), 8210 states have internal predecessors, (11759), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-22 02:07:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9665 states to 9665 states and 13457 transitions. [2022-11-22 02:07:27,596 INFO L78 Accepts]: Start accepts. Automaton has 9665 states and 13457 transitions. Word has length 117 [2022-11-22 02:07:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:27,597 INFO L495 AbstractCegarLoop]: Abstraction has 9665 states and 13457 transitions. [2022-11-22 02:07:27,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 9665 states and 13457 transitions. [2022-11-22 02:07:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 02:07:27,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:27,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:27,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-22 02:07:27,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:07:27,823 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:27,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1320211614, now seen corresponding path program 1 times [2022-11-22 02:07:27,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:27,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596983521] [2022-11-22 02:07:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:27,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:07:27,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596983521] [2022-11-22 02:07:27,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596983521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731094065] [2022-11-22 02:07:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:27,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:27,910 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:27,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:07:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:28,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:07:28,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:28,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731094065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:28,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:28,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-22 02:07:28,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468663578] [2022-11-22 02:07:28,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:28,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:07:28,145 INFO L87 Difference]: Start difference. First operand 9665 states and 13457 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:29,544 INFO L93 Difference]: Finished difference Result 15251 states and 20837 transitions. [2022-11-22 02:07:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2022-11-22 02:07:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:29,579 INFO L225 Difference]: With dead ends: 15251 [2022-11-22 02:07:29,580 INFO L226 Difference]: Without dead ends: 9649 [2022-11-22 02:07:29,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:07:29,596 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 86 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:29,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 6380 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:07:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9649 states. [2022-11-22 02:07:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9649 to 9537. [2022-11-22 02:07:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 8061 states have (on average 1.4150849770499938) internal successors, (11407), 8082 states have internal predecessors, (11407), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-22 02:07:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 13105 transitions. [2022-11-22 02:07:30,897 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 13105 transitions. Word has length 117 [2022-11-22 02:07:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:30,898 INFO L495 AbstractCegarLoop]: Abstraction has 9537 states and 13105 transitions. [2022-11-22 02:07:30,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 13105 transitions. [2022-11-22 02:07:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-22 02:07:30,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:30,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:30,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:31,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:07:31,124 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1316245515, now seen corresponding path program 1 times [2022-11-22 02:07:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:31,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788050560] [2022-11-22 02:07:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:07:31,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:31,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788050560] [2022-11-22 02:07:31,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788050560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:31,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:31,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-22 02:07:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080931811] [2022-11-22 02:07:31,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:31,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:07:31,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:07:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:07:31,797 INFO L87 Difference]: Start difference. First operand 9537 states and 13105 transitions. Second operand has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-22 02:07:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:35,468 INFO L93 Difference]: Finished difference Result 21997 states and 29098 transitions. [2022-11-22 02:07:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:07:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 114 [2022-11-22 02:07:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:35,527 INFO L225 Difference]: With dead ends: 21997 [2022-11-22 02:07:35,527 INFO L226 Difference]: Without dead ends: 18009 [2022-11-22 02:07:35,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:07:35,549 INFO L413 NwaCegarLoop]: 3124 mSDtfsCounter, 10560 mSDsluCounter, 12533 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10575 SdHoareTripleChecker+Valid, 15657 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:35,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10575 Valid, 15657 Invalid, 2041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [309 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 02:07:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2022-11-22 02:07:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 15807. [2022-11-22 02:07:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15807 states, 13287 states have (on average 1.342891548129751) internal successors, (17843), 13320 states have internal predecessors, (17843), 1367 states have call successors, (1367), 1151 states have call predecessors, (1367), 1151 states have return successors, (1464), 1336 states have call predecessors, (1464), 1367 states have call successors, (1464) [2022-11-22 02:07:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15807 states to 15807 states and 20674 transitions. [2022-11-22 02:07:37,273 INFO L78 Accepts]: Start accepts. Automaton has 15807 states and 20674 transitions. Word has length 114 [2022-11-22 02:07:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:37,273 INFO L495 AbstractCegarLoop]: Abstraction has 15807 states and 20674 transitions. [2022-11-22 02:07:37,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-22 02:07:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 15807 states and 20674 transitions. [2022-11-22 02:07:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-22 02:07:37,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:37,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:37,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 02:07:37,290 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:37,290 INFO L85 PathProgramCache]: Analyzing trace with hash 801141385, now seen corresponding path program 1 times [2022-11-22 02:07:37,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:37,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353299200] [2022-11-22 02:07:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:37,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:07:37,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353299200] [2022-11-22 02:07:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353299200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:37,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:37,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:07:37,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952694987] [2022-11-22 02:07:37,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:37,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:07:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:07:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:07:37,511 INFO L87 Difference]: Start difference. First operand 15807 states and 20674 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:40,134 INFO L93 Difference]: Finished difference Result 24037 states and 30733 transitions. [2022-11-22 02:07:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:07:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-22 02:07:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:40,195 INFO L225 Difference]: With dead ends: 24037 [2022-11-22 02:07:40,195 INFO L226 Difference]: Without dead ends: 16805 [2022-11-22 02:07:40,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:40,212 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 94 mSDsluCounter, 9420 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 12631 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:40,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 12631 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:07:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2022-11-22 02:07:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 16129. [2022-11-22 02:07:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16129 states, 13391 states have (on average 1.324994399223359) internal successors, (17743), 13457 states have internal predecessors, (17743), 1494 states have call successors, (1494), 1236 states have call predecessors, (1494), 1242 states have return successors, (1656), 1436 states have call predecessors, (1656), 1494 states have call successors, (1656) [2022-11-22 02:07:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16129 states to 16129 states and 20893 transitions. [2022-11-22 02:07:41,898 INFO L78 Accepts]: Start accepts. Automaton has 16129 states and 20893 transitions. Word has length 115 [2022-11-22 02:07:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:41,898 INFO L495 AbstractCegarLoop]: Abstraction has 16129 states and 20893 transitions. [2022-11-22 02:07:41,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:07:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 16129 states and 20893 transitions. [2022-11-22 02:07:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 02:07:41,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:41,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:41,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 02:07:41,912 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash -344960877, now seen corresponding path program 1 times [2022-11-22 02:07:41,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:41,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179832064] [2022-11-22 02:07:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:41,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 02:07:42,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179832064] [2022-11-22 02:07:42,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179832064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140079050] [2022-11-22 02:07:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:42,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:42,135 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:07:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:07:42,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:42,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:42,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140079050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:42,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:42,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-22 02:07:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168162529] [2022-11-22 02:07:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:42,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:07:42,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:07:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:42,431 INFO L87 Difference]: Start difference. First operand 16129 states and 20893 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 02:07:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:45,939 INFO L93 Difference]: Finished difference Result 31038 states and 39132 transitions. [2022-11-22 02:07:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:07:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-22 02:07:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:46,005 INFO L225 Difference]: With dead ends: 31038 [2022-11-22 02:07:46,006 INFO L226 Difference]: Without dead ends: 21336 [2022-11-22 02:07:46,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:07:46,031 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 197 mSDsluCounter, 12486 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 15702 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:46,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 15702 Invalid, 1373 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [51 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 02:07:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21336 states. [2022-11-22 02:07:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21336 to 20074. [2022-11-22 02:07:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20074 states, 16515 states have (on average 1.2927641537995762) internal successors, (21350), 16578 states have internal predecessors, (21350), 1966 states have call successors, (1966), 1603 states have call predecessors, (1966), 1591 states have return successors, (2260), 1893 states have call predecessors, (2260), 1966 states have call successors, (2260) [2022-11-22 02:07:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20074 states to 20074 states and 25576 transitions. [2022-11-22 02:07:48,191 INFO L78 Accepts]: Start accepts. Automaton has 20074 states and 25576 transitions. Word has length 116 [2022-11-22 02:07:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:48,192 INFO L495 AbstractCegarLoop]: Abstraction has 20074 states and 25576 transitions. [2022-11-22 02:07:48,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 02:07:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 20074 states and 25576 transitions. [2022-11-22 02:07:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-22 02:07:48,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:48,214 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:48,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:48,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:48,421 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1637947522, now seen corresponding path program 1 times [2022-11-22 02:07:48,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:48,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098132094] [2022-11-22 02:07:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:48,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-22 02:07:48,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:48,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098132094] [2022-11-22 02:07:48,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098132094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:48,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107738187] [2022-11-22 02:07:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:48,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:48,626 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:48,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:07:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:48,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:07:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:07:48,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:48,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107738187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:48,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:48,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-22 02:07:48,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000728186] [2022-11-22 02:07:48,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:48,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:48,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:48,940 INFO L87 Difference]: Start difference. First operand 20074 states and 25576 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:51,561 INFO L93 Difference]: Finished difference Result 35206 states and 44397 transitions. [2022-11-22 02:07:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:51,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-11-22 02:07:51,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:51,622 INFO L225 Difference]: With dead ends: 35206 [2022-11-22 02:07:51,622 INFO L226 Difference]: Without dead ends: 22349 [2022-11-22 02:07:51,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:07:51,654 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3345 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3345 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:51,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3345 Valid, 3207 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:07:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22349 states. [2022-11-22 02:07:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22349 to 21575. [2022-11-22 02:07:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21575 states, 17881 states have (on average 1.2700072702868968) internal successors, (22709), 18019 states have internal predecessors, (22709), 1966 states have call successors, (1966), 1654 states have call predecessors, (1966), 1726 states have return successors, (2383), 1902 states have call predecessors, (2383), 1966 states have call successors, (2383) [2022-11-22 02:07:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21575 states to 21575 states and 27058 transitions. [2022-11-22 02:07:54,424 INFO L78 Accepts]: Start accepts. Automaton has 21575 states and 27058 transitions. Word has length 141 [2022-11-22 02:07:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:54,425 INFO L495 AbstractCegarLoop]: Abstraction has 21575 states and 27058 transitions. [2022-11-22 02:07:54,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:07:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 21575 states and 27058 transitions. [2022-11-22 02:07:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-22 02:07:54,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:54,444 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:07:54,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:07:54,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-22 02:07:54,652 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1559505119, now seen corresponding path program 1 times [2022-11-22 02:07:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:54,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527445076] [2022-11-22 02:07:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-22 02:07:54,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:54,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527445076] [2022-11-22 02:07:54,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527445076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:07:54,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998110064] [2022-11-22 02:07:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:54,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:07:54,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:54,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:07:54,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:07:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:54,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:07:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:07:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-22 02:07:55,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:07:55,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998110064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:55,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:07:55,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-22 02:07:55,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019357812] [2022-11-22 02:07:55,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:55,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:07:55,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:07:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:07:55,019 INFO L87 Difference]: Start difference. First operand 21575 states and 27058 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 02:07:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:58,148 INFO L93 Difference]: Finished difference Result 35655 states and 44777 transitions. [2022-11-22 02:07:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:07:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 141 [2022-11-22 02:07:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:58,217 INFO L225 Difference]: With dead ends: 35655 [2022-11-22 02:07:58,217 INFO L226 Difference]: Without dead ends: 21526 [2022-11-22 02:07:58,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:07:58,246 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 85 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 6371 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:58,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6371 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:07:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21526 states. [2022-11-22 02:08:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21526 to 21359. [2022-11-22 02:08:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21359 states, 17665 states have (on average 1.2407585621285027) internal successors, (21918), 17803 states have internal predecessors, (21918), 1966 states have call successors, (1966), 1654 states have call predecessors, (1966), 1726 states have return successors, (2383), 1902 states have call predecessors, (2383), 1966 states have call successors, (2383) [2022-11-22 02:08:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21359 states to 21359 states and 26267 transitions. [2022-11-22 02:08:00,602 INFO L78 Accepts]: Start accepts. Automaton has 21359 states and 26267 transitions. Word has length 141 [2022-11-22 02:08:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:00,603 INFO L495 AbstractCegarLoop]: Abstraction has 21359 states and 26267 transitions. [2022-11-22 02:08:00,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 02:08:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 21359 states and 26267 transitions. [2022-11-22 02:08:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:08:00,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:00,619 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:08:00,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:08:00,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 02:08:00,835 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2024690614, now seen corresponding path program 1 times [2022-11-22 02:08:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:00,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905569970] [2022-11-22 02:08:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-22 02:08:01,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:01,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905569970] [2022-11-22 02:08:01,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905569970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:08:01,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930939226] [2022-11-22 02:08:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:01,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:08:01,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:08:01,235 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:08:01,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 02:08:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:01,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:08:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:08:01,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:08:01,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930939226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:01,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:08:01,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-22 02:08:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367883865] [2022-11-22 02:08:01,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:01,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:08:01,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:08:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:08:01,563 INFO L87 Difference]: Start difference. First operand 21359 states and 26267 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-22 02:08:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:05,641 INFO L93 Difference]: Finished difference Result 41136 states and 49552 transitions. [2022-11-22 02:08:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:08:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-22 02:08:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:05,701 INFO L225 Difference]: With dead ends: 41136 [2022-11-22 02:08:05,701 INFO L226 Difference]: Without dead ends: 27280 [2022-11-22 02:08:05,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:08:05,726 INFO L413 NwaCegarLoop]: 3213 mSDtfsCounter, 210 mSDsluCounter, 9350 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 12563 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:05,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 12563 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:08:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27280 states. [2022-11-22 02:08:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27280 to 25890. [2022-11-22 02:08:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25890 states, 21282 states have (on average 1.2168499201202894) internal successors, (25897), 21467 states have internal predecessors, (25897), 2460 states have call successors, (2460), 2046 states have call predecessors, (2460), 2146 states have return successors, (3151), 2377 states have call predecessors, (3151), 2460 states have call successors, (3151) [2022-11-22 02:08:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25890 states to 25890 states and 31508 transitions. [2022-11-22 02:08:08,710 INFO L78 Accepts]: Start accepts. Automaton has 25890 states and 31508 transitions. Word has length 144 [2022-11-22 02:08:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:08,711 INFO L495 AbstractCegarLoop]: Abstraction has 25890 states and 31508 transitions. [2022-11-22 02:08:08,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-22 02:08:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 25890 states and 31508 transitions. [2022-11-22 02:08:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-22 02:08:08,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:08,739 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:08:08,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:08:08,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:08:08,946 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1003907817, now seen corresponding path program 1 times [2022-11-22 02:08:08,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:08,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251487991] [2022-11-22 02:08:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:08,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 02:08:09,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:09,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251487991] [2022-11-22 02:08:09,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251487991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:08:09,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155412101] [2022-11-22 02:08:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:09,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:08:09,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:08:09,819 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:08:09,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:08:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:10,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:08:10,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:08:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 02:08:10,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:08:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-22 02:08:10,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155412101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:08:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493646717] [2022-11-22 02:08:10,756 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-22 02:08:10,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:08:10,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:08:10,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:08:10,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:08:25,890 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 113 for LOIs [2022-11-22 02:08:25,926 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 113 for LOIs [2022-11-22 02:08:25,965 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 113 for LOIs [2022-11-22 02:08:25,983 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-22 02:08:25,994 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 112 for LOIs [2022-11-22 02:08:26,335 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-22 02:08:27,260 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:08:56,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '733534#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-11-22 02:08:56,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:08:56,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:08:56,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-22 02:08:56,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710029735] [2022-11-22 02:08:56,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:08:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:08:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:08:56,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=5031, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 02:08:56,762 INFO L87 Difference]: Start difference. First operand 25890 states and 31508 transitions. Second operand has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-22 02:09:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:04,028 INFO L93 Difference]: Finished difference Result 44661 states and 54267 transitions. [2022-11-22 02:09:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-22 02:09:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 159 [2022-11-22 02:09:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:04,070 INFO L225 Difference]: With dead ends: 44661 [2022-11-22 02:09:04,070 INFO L226 Difference]: Without dead ends: 20378 [2022-11-22 02:09:04,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 432 SyntacticMatches, 23 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9155 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=1274, Invalid=17358, Unknown=0, NotChecked=0, Total=18632 [2022-11-22 02:09:04,108 INFO L413 NwaCegarLoop]: 3303 mSDtfsCounter, 7875 mSDsluCounter, 29885 mSDsCounter, 0 mSdLazyCounter, 4434 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7886 SdHoareTripleChecker+Valid, 33188 SdHoareTripleChecker+Invalid, 4800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 4434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:04,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7886 Valid, 33188 Invalid, 4800 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [366 Valid, 4434 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-22 02:09:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20378 states. [2022-11-22 02:09:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20378 to 15381. [2022-11-22 02:09:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15381 states, 12867 states have (on average 1.2640087044377089) internal successors, (16264), 12948 states have internal predecessors, (16264), 1300 states have call successors, (1300), 1164 states have call predecessors, (1300), 1212 states have return successors, (1621), 1268 states have call predecessors, (1621), 1300 states have call successors, (1621) [2022-11-22 02:09:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15381 states to 15381 states and 19185 transitions. [2022-11-22 02:09:06,233 INFO L78 Accepts]: Start accepts. Automaton has 15381 states and 19185 transitions. Word has length 159 [2022-11-22 02:09:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:06,233 INFO L495 AbstractCegarLoop]: Abstraction has 15381 states and 19185 transitions. [2022-11-22 02:09:06,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-22 02:09:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 15381 states and 19185 transitions. [2022-11-22 02:09:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-22 02:09:06,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:06,245 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:06,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:06,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:06,446 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1569736705, now seen corresponding path program 1 times [2022-11-22 02:09:06,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:06,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358943156] [2022-11-22 02:09:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:06,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 02:09:06,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358943156] [2022-11-22 02:09:06,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358943156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:06,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696836451] [2022-11-22 02:09:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:06,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:06,795 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:06,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 02:09:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:07,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:09:07,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 111 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:09:07,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-22 02:09:07,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696836451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763235042] [2022-11-22 02:09:07,760 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-22 02:09:07,760 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:09:07,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:09:07,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:09:07,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:09:19,625 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 112 for LOIs [2022-11-22 02:09:19,666 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 112 for LOIs [2022-11-22 02:09:19,696 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 136 for LOIs [2022-11-22 02:09:19,719 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-22 02:09:19,728 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-22 02:09:19,830 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-22 02:09:20,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:09:47,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '816230#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-22 02:09:47,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:09:47,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:09:47,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2022-11-22 02:09:47,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510626826] [2022-11-22 02:09:47,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:09:47,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:09:47,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:09:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=4802, Unknown=0, NotChecked=0, Total=5256 [2022-11-22 02:09:47,769 INFO L87 Difference]: Start difference. First operand 15381 states and 19185 transitions. Second operand has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) [2022-11-22 02:09:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:54,244 INFO L93 Difference]: Finished difference Result 27232 states and 33287 transitions. [2022-11-22 02:09:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-22 02:09:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) Word has length 162 [2022-11-22 02:09:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:54,272 INFO L225 Difference]: With dead ends: 27232 [2022-11-22 02:09:54,272 INFO L226 Difference]: Without dead ends: 13811 [2022-11-22 02:09:54,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 435 SyntacticMatches, 32 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12515 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=1632, Invalid=23808, Unknown=0, NotChecked=0, Total=25440 [2022-11-22 02:09:54,293 INFO L413 NwaCegarLoop]: 3420 mSDtfsCounter, 11013 mSDsluCounter, 30960 mSDsCounter, 0 mSdLazyCounter, 4235 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11020 SdHoareTripleChecker+Valid, 34380 SdHoareTripleChecker+Invalid, 4497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 4235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:54,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11020 Valid, 34380 Invalid, 4497 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [262 Valid, 4235 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-22 02:09:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13811 states. [2022-11-22 02:09:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13811 to 11284. [2022-11-22 02:09:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 9538 states have (on average 1.29555462361082) internal successors, (12357), 9588 states have internal predecessors, (12357), 887 states have call successors, (887), 819 states have call predecessors, (887), 857 states have return successors, (1141), 876 states have call predecessors, (1141), 887 states have call successors, (1141) [2022-11-22 02:09:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 14385 transitions. [2022-11-22 02:09:55,667 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 14385 transitions. Word has length 162 [2022-11-22 02:09:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:55,667 INFO L495 AbstractCegarLoop]: Abstraction has 11284 states and 14385 transitions. [2022-11-22 02:09:55,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) [2022-11-22 02:09:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 14385 transitions. [2022-11-22 02:09:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-22 02:09:55,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:55,675 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:55,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:55,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:55,876 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1764448269, now seen corresponding path program 1 times [2022-11-22 02:09:55,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:55,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794684190] [2022-11-22 02:09:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:55,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-22 02:09:56,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:56,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794684190] [2022-11-22 02:09:56,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794684190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:56,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710923502] [2022-11-22 02:09:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:56,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:56,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:56,817 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:56,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 02:09:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:09:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 02:09:57,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:57,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710923502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:57,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:57,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 02:09:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902725400] [2022-11-22 02:09:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:09:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:09:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:09:57,099 INFO L87 Difference]: Start difference. First operand 11284 states and 14385 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-22 02:09:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:58,669 INFO L93 Difference]: Finished difference Result 19662 states and 23957 transitions. [2022-11-22 02:09:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:58,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 164 [2022-11-22 02:09:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:58,691 INFO L225 Difference]: With dead ends: 19662 [2022-11-22 02:09:58,691 INFO L226 Difference]: Without dead ends: 10594 [2022-11-22 02:09:58,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:09:58,704 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 3353 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3353 SdHoareTripleChecker+Valid, 6531 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:58,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3353 Valid, 6531 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:09:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2022-11-22 02:09:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10286. [2022-11-22 02:09:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10286 states, 8723 states have (on average 1.2956551645076235) internal successors, (11302), 8802 states have internal predecessors, (11302), 782 states have call successors, (782), 714 states have call predecessors, (782), 779 states have return successors, (1028), 769 states have call predecessors, (1028), 782 states have call successors, (1028) [2022-11-22 02:09:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10286 states to 10286 states and 13112 transitions. [2022-11-22 02:09:59,806 INFO L78 Accepts]: Start accepts. Automaton has 10286 states and 13112 transitions. Word has length 164 [2022-11-22 02:09:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:59,806 INFO L495 AbstractCegarLoop]: Abstraction has 10286 states and 13112 transitions. [2022-11-22 02:09:59,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-22 02:09:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10286 states and 13112 transitions. [2022-11-22 02:09:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-22 02:09:59,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:59,813 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:59,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 02:10:00,014 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1421785900, now seen corresponding path program 1 times [2022-11-22 02:10:00,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:00,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88584056] [2022-11-22 02:10:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:00,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-22 02:10:00,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:00,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88584056] [2022-11-22 02:10:00,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88584056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:00,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448833731] [2022-11-22 02:10:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:00,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:00,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:00,922 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:00,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 02:10:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:01,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 02:10:01,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:10:01,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-22 02:10:02,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448833731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:02,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147424701] [2022-11-22 02:10:02,411 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2022-11-22 02:10:02,411 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:10:02,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:10:02,412 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:10:02,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:10:15,024 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 111 for LOIs [2022-11-22 02:10:15,058 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 111 for LOIs [2022-11-22 02:10:15,092 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 111 for LOIs [2022-11-22 02:10:15,111 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-22 02:10:15,122 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-22 02:10:15,218 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-22 02:10:15,883 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:10:48,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '908852#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-22 02:10:48,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:10:48,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:10:48,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 32 [2022-11-22 02:10:48,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816884396] [2022-11-22 02:10:48,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:10:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 02:10:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 02:10:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=7743, Unknown=0, NotChecked=0, Total=8372 [2022-11-22 02:10:48,430 INFO L87 Difference]: Start difference. First operand 10286 states and 13112 transitions. Second operand has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-22 02:10:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:58,646 INFO L93 Difference]: Finished difference Result 26778 states and 32368 transitions. [2022-11-22 02:10:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-22 02:10:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 165 [2022-11-22 02:10:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:58,686 INFO L225 Difference]: With dead ends: 26778 [2022-11-22 02:10:58,686 INFO L226 Difference]: Without dead ends: 19628 [2022-11-22 02:10:58,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 431 SyntacticMatches, 8 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9396 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=2312, Invalid=20338, Unknown=0, NotChecked=0, Total=22650 [2022-11-22 02:10:58,700 INFO L413 NwaCegarLoop]: 3138 mSDtfsCounter, 29361 mSDsluCounter, 25703 mSDsCounter, 0 mSdLazyCounter, 5276 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29363 SdHoareTripleChecker+Valid, 28841 SdHoareTripleChecker+Invalid, 6819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 5276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:58,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29363 Valid, 28841 Invalid, 6819 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1543 Valid, 5276 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-22 02:10:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19628 states. [2022-11-22 02:11:00,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19628 to 13365. [2022-11-22 02:11:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13365 states, 11159 states have (on average 1.257549959673806) internal successors, (14033), 11226 states have internal predecessors, (14033), 1144 states have call successors, (1144), 1028 states have call predecessors, (1144), 1060 states have return successors, (1394), 1110 states have call predecessors, (1394), 1144 states have call successors, (1394) [2022-11-22 02:11:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13365 states to 13365 states and 16571 transitions. [2022-11-22 02:11:00,364 INFO L78 Accepts]: Start accepts. Automaton has 13365 states and 16571 transitions. Word has length 165 [2022-11-22 02:11:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:00,364 INFO L495 AbstractCegarLoop]: Abstraction has 13365 states and 16571 transitions. [2022-11-22 02:11:00,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-22 02:11:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 13365 states and 16571 transitions. [2022-11-22 02:11:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-22 02:11:00,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:00,370 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:00,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 02:11:00,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-22 02:11:00,570 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:00,571 INFO L85 PathProgramCache]: Analyzing trace with hash 962691595, now seen corresponding path program 1 times [2022-11-22 02:11:00,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:00,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078556382] [2022-11-22 02:11:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:00,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-22 02:11:00,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:00,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078556382] [2022-11-22 02:11:00,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078556382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:00,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:11:00,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:11:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289110634] [2022-11-22 02:11:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:00,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:11:00,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:11:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:00,796 INFO L87 Difference]: Start difference. First operand 13365 states and 16571 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 02:11:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:07,333 INFO L93 Difference]: Finished difference Result 40727 states and 47893 transitions. [2022-11-22 02:11:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:11:07,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 173 [2022-11-22 02:11:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:07,421 INFO L225 Difference]: With dead ends: 40727 [2022-11-22 02:11:07,421 INFO L226 Difference]: Without dead ends: 36739 [2022-11-22 02:11:07,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:07,438 INFO L413 NwaCegarLoop]: 3403 mSDtfsCounter, 3633 mSDsluCounter, 9927 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3633 SdHoareTripleChecker+Valid, 13330 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:07,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3633 Valid, 13330 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 02:11:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36739 states. [2022-11-22 02:11:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36739 to 26994. [2022-11-22 02:11:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26994 states, 22107 states have (on average 1.1941014158411363) internal successors, (26398), 22227 states have internal predecessors, (26398), 2576 states have call successors, (2576), 2260 states have call predecessors, (2576), 2309 states have return successors, (3182), 2506 states have call predecessors, (3182), 2576 states have call successors, (3182) [2022-11-22 02:11:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26994 states to 26994 states and 32156 transitions. [2022-11-22 02:11:11,452 INFO L78 Accepts]: Start accepts. Automaton has 26994 states and 32156 transitions. Word has length 173 [2022-11-22 02:11:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:11,453 INFO L495 AbstractCegarLoop]: Abstraction has 26994 states and 32156 transitions. [2022-11-22 02:11:11,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 02:11:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 26994 states and 32156 transitions. [2022-11-22 02:11:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-22 02:11:11,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:11,464 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:11,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-22 02:11:11,465 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash 676096235, now seen corresponding path program 1 times [2022-11-22 02:11:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:11,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184399028] [2022-11-22 02:11:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 75 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-22 02:11:12,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184399028] [2022-11-22 02:11:12,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184399028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699622974] [2022-11-22 02:11:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:12,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:12,423 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:12,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 02:11:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:11:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-22 02:11:12,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:11:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-22 02:11:13,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699622974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:11:13,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887707408] [2022-11-22 02:11:13,440 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-11-22 02:11:13,440 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:11:13,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:11:13,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:11:13,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:11:24,241 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 111 for LOIs [2022-11-22 02:11:24,270 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 111 for LOIs [2022-11-22 02:11:24,301 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 111 for LOIs [2022-11-22 02:11:24,320 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-22 02:11:24,328 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-22 02:11:24,433 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-22 02:11:25,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:11:51,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1055064#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-22 02:11:51,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:11:51,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:11:51,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 12] total 31 [2022-11-22 02:11:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454584670] [2022-11-22 02:11:51,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:11:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 02:11:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 02:11:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=8118, Unknown=0, NotChecked=0, Total=8742 [2022-11-22 02:11:51,559 INFO L87 Difference]: Start difference. First operand 26994 states and 32156 transitions. Second operand has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-22 02:11:59,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:59,329 INFO L93 Difference]: Finished difference Result 35487 states and 41823 transitions. [2022-11-22 02:11:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-22 02:11:59,329 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 191 [2022-11-22 02:11:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:59,353 INFO L225 Difference]: With dead ends: 35487 [2022-11-22 02:11:59,353 INFO L226 Difference]: Without dead ends: 11099 [2022-11-22 02:11:59,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 508 SyntacticMatches, 9 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9605 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=2187, Invalid=20163, Unknown=0, NotChecked=0, Total=22350 [2022-11-22 02:11:59,387 INFO L413 NwaCegarLoop]: 3129 mSDtfsCounter, 32672 mSDsluCounter, 28101 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 1262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32674 SdHoareTripleChecker+Valid, 31230 SdHoareTripleChecker+Invalid, 5864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:59,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32674 Valid, 31230 Invalid, 5864 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1262 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:11:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11099 states. [2022-11-22 02:12:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11099 to 8666. [2022-11-22 02:12:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8666 states, 7363 states have (on average 1.3118294173570555) internal successors, (9659), 7389 states have internal predecessors, (9659), 688 states have call successors, (688), 621 states have call predecessors, (688), 613 states have return successors, (702), 655 states have call predecessors, (702), 688 states have call successors, (702) [2022-11-22 02:12:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8666 states to 8666 states and 11049 transitions. [2022-11-22 02:12:00,584 INFO L78 Accepts]: Start accepts. Automaton has 8666 states and 11049 transitions. Word has length 191 [2022-11-22 02:12:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:00,584 INFO L495 AbstractCegarLoop]: Abstraction has 8666 states and 11049 transitions. [2022-11-22 02:12:00,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-22 02:12:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 8666 states and 11049 transitions. [2022-11-22 02:12:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-22 02:12:00,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:00,590 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:00,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:00,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:00,790 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash 118045253, now seen corresponding path program 1 times [2022-11-22 02:12:00,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:00,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693626912] [2022-11-22 02:12:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:00,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-22 02:12:01,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693626912] [2022-11-22 02:12:01,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693626912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775761388] [2022-11-22 02:12:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:01,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:01,006 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:01,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 02:12:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:01,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:12:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-22 02:12:01,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:12:01,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775761388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:01,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:12:01,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-22 02:12:01,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348590027] [2022-11-22 02:12:01,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:01,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:12:01,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:12:01,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:12:01,295 INFO L87 Difference]: Start difference. First operand 8666 states and 11049 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 02:12:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:03,369 INFO L93 Difference]: Finished difference Result 15650 states and 18720 transitions. [2022-11-22 02:12:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:12:03,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 210 [2022-11-22 02:12:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:03,385 INFO L225 Difference]: With dead ends: 15650 [2022-11-22 02:12:03,385 INFO L226 Difference]: Without dead ends: 9364 [2022-11-22 02:12:03,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:12:03,394 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3354 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 6570 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:03,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3354 Valid, 6570 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:12:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2022-11-22 02:12:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 9092. [2022-11-22 02:12:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9092 states, 7688 states have (on average 1.2870707596253903) internal successors, (9895), 7721 states have internal predecessors, (9895), 747 states have call successors, (747), 663 states have call predecessors, (747), 655 states have return successors, (761), 707 states have call predecessors, (761), 747 states have call successors, (761) [2022-11-22 02:12:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9092 states to 9092 states and 11403 transitions. [2022-11-22 02:12:04,642 INFO L78 Accepts]: Start accepts. Automaton has 9092 states and 11403 transitions. Word has length 210 [2022-11-22 02:12:04,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:04,643 INFO L495 AbstractCegarLoop]: Abstraction has 9092 states and 11403 transitions. [2022-11-22 02:12:04,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 02:12:04,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9092 states and 11403 transitions. [2022-11-22 02:12:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-22 02:12:04,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:04,649 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:04,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:04,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:04,850 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash -946377975, now seen corresponding path program 2 times [2022-11-22 02:12:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:04,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129323887] [2022-11-22 02:12:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 53 proven. 63 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-22 02:12:05,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:05,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129323887] [2022-11-22 02:12:05,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129323887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:05,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4742097] [2022-11-22 02:12:05,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:12:05,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:05,063 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:05,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 02:12:05,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:12:05,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:12:05,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:12:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-22 02:12:05,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:12:05,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4742097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:05,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:12:05,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-22 02:12:05,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615808] [2022-11-22 02:12:05,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:12:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:12:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:12:05,288 INFO L87 Difference]: Start difference. First operand 9092 states and 11403 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:12:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:07,029 INFO L93 Difference]: Finished difference Result 13080 states and 15708 transitions. [2022-11-22 02:12:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:12:07,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 210 [2022-11-22 02:12:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:07,044 INFO L225 Difference]: With dead ends: 13080 [2022-11-22 02:12:07,044 INFO L226 Difference]: Without dead ends: 7569 [2022-11-22 02:12:07,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:12:07,056 INFO L413 NwaCegarLoop]: 3213 mSDtfsCounter, 3366 mSDsluCounter, 3303 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 6516 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:07,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 6516 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:12:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7569 states. [2022-11-22 02:12:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7569 to 7150. [2022-11-22 02:12:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 6137 states have (on average 1.334854163271957) internal successors, (8192), 6162 states have internal predecessors, (8192), 535 states have call successors, (535), 479 states have call predecessors, (535), 476 states have return successors, (543), 508 states have call predecessors, (543), 535 states have call successors, (543) [2022-11-22 02:12:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 9270 transitions. [2022-11-22 02:12:08,207 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 9270 transitions. Word has length 210 [2022-11-22 02:12:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:08,208 INFO L495 AbstractCegarLoop]: Abstraction has 7150 states and 9270 transitions. [2022-11-22 02:12:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:12:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 9270 transitions. [2022-11-22 02:12:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-22 02:12:08,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:08,213 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:08,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:08,414 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:08,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1950634234, now seen corresponding path program 1 times [2022-11-22 02:12:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:08,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396818081] [2022-11-22 02:12:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:08,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 156 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-22 02:12:08,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396818081] [2022-11-22 02:12:08,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396818081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498651764] [2022-11-22 02:12:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:08,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:08,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:08,853 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:08,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 02:12:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 02:12:09,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-22 02:12:09,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:12:09,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498651764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:09,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:12:09,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-11-22 02:12:09,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664124544] [2022-11-22 02:12:09,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:09,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:12:09,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:12:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:12:09,264 INFO L87 Difference]: Start difference. First operand 7150 states and 9270 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 02:12:10,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:10,509 INFO L93 Difference]: Finished difference Result 8158 states and 10365 transitions. [2022-11-22 02:12:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:12:10,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 211 [2022-11-22 02:12:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:10,515 INFO L225 Difference]: With dead ends: 8158 [2022-11-22 02:12:10,515 INFO L226 Difference]: Without dead ends: 2895 [2022-11-22 02:12:10,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:12:10,521 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 87 mSDsluCounter, 6256 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 9442 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:10,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 9442 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:12:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-11-22 02:12:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2841. [2022-11-22 02:12:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2611 states have (on average 1.6595174262734584) internal successors, (4333), 2616 states have internal predecessors, (4333), 124 states have call successors, (124), 105 states have call predecessors, (124), 104 states have return successors, (127), 119 states have call predecessors, (127), 124 states have call successors, (127) [2022-11-22 02:12:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4584 transitions. [2022-11-22 02:12:10,777 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4584 transitions. Word has length 211 [2022-11-22 02:12:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:10,778 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 4584 transitions. [2022-11-22 02:12:10,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 02:12:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4584 transitions. [2022-11-22 02:12:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-22 02:12:10,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:10,782 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:10,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:10,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:10,983 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:10,983 INFO L85 PathProgramCache]: Analyzing trace with hash 160806067, now seen corresponding path program 1 times [2022-11-22 02:12:10,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:10,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547086277] [2022-11-22 02:12:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 44 proven. 91 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-11-22 02:12:11,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:11,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547086277] [2022-11-22 02:12:11,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547086277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:11,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632636275] [2022-11-22 02:12:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:11,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:11,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:11,476 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:11,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-22 02:12:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:11,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:12:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 467 proven. 105 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-22 02:12:12,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:12:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-11-22 02:12:12,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632636275] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:12,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:12:12,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 6] total 17 [2022-11-22 02:12:12,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815317035] [2022-11-22 02:12:12,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:12,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:12:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:12:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:12:12,549 INFO L87 Difference]: Start difference. First operand 2841 states and 4584 transitions. Second operand has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 02:12:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:13,616 INFO L93 Difference]: Finished difference Result 3087 states and 4848 transitions. [2022-11-22 02:12:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:12:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 311 [2022-11-22 02:12:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:13,620 INFO L225 Difference]: With dead ends: 3087 [2022-11-22 02:12:13,620 INFO L226 Difference]: Without dead ends: 1642 [2022-11-22 02:12:13,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:12:13,623 INFO L413 NwaCegarLoop]: 3152 mSDtfsCounter, 10060 mSDsluCounter, 3118 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10061 SdHoareTripleChecker+Valid, 6270 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:13,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10061 Valid, 6270 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:12:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-11-22 02:12:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2022-11-22 02:12:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.9914686166971358) internal successors, (3268), 1641 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3268 transitions. [2022-11-22 02:12:13,648 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3268 transitions. Word has length 311 [2022-11-22 02:12:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:13,648 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 3268 transitions. [2022-11-22 02:12:13,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 02:12:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3268 transitions. [2022-11-22 02:12:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2022-11-22 02:12:13,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:13,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:13,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:13,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98ac35c-b2f9-4be4-a6a5-da6b83c18c24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-22 02:12:13,890 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash -521939527, now seen corresponding path program 1 times [2022-11-22 02:12:13,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:13,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036920739] [2022-11-22 02:12:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:12:16,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036920739] [2022-11-22 02:12:16,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036920739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:16,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:12:16,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:12:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263378455] [2022-11-22 02:12:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:16,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:12:16,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:12:16,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:12:16,994 INFO L87 Difference]: Start difference. First operand 1642 states and 3268 transitions. Second operand has 4 states, 4 states have (on average 408.0) internal successors, (1632), 3 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:35,867 INFO L93 Difference]: Finished difference Result 8193 states and 16325 transitions. [2022-11-22 02:12:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:12:35,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 408.0) internal successors, (1632), 3 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1632 [2022-11-22 02:12:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:35,878 INFO L225 Difference]: With dead ends: 8193 [2022-11-22 02:12:35,878 INFO L226 Difference]: Without dead ends: 6553 [2022-11-22 02:12:35,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:12:35,881 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 3699 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 9654 mSolverCounterSat, 5550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3699 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 15204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5550 IncrementalHoareTripleChecker+Valid, 9654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:35,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3699 Valid, 481 Invalid, 15204 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5550 Valid, 9654 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2022-11-22 02:12:35,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2022-11-22 02:12:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 4918. [2022-11-22 02:12:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4918 states, 4917 states have (on average 1.5603009965426073) internal successors, (7672), 4917 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 7672 transitions. [2022-11-22 02:12:35,950 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 7672 transitions. Word has length 1632 [2022-11-22 02:12:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:35,951 INFO L495 AbstractCegarLoop]: Abstraction has 4918 states and 7672 transitions. [2022-11-22 02:12:35,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 408.0) internal successors, (1632), 3 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 7672 transitions. [2022-11-22 02:12:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1753 [2022-11-22 02:12:35,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:35,984 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:35,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-22 02:12:35,985 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash -53158643, now seen corresponding path program 1 times [2022-11-22 02:12:35,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:35,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513318900] [2022-11-22 02:12:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:35,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:12:37,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:37,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513318900] [2022-11-22 02:12:37,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513318900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:37,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:12:37,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:12:37,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16161156] [2022-11-22 02:12:37,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:37,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:12:37,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:37,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:12:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:12:37,318 INFO L87 Difference]: Start difference. First operand 4918 states and 7672 transitions. Second operand has 3 states, 3 states have (on average 584.0) internal successors, (1752), 3 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:45,109 INFO L93 Difference]: Finished difference Result 13110 states and 21367 transitions. [2022-11-22 02:12:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:12:45,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 584.0) internal successors, (1752), 3 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1752 [2022-11-22 02:12:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:45,120 INFO L225 Difference]: With dead ends: 13110 [2022-11-22 02:12:45,120 INFO L226 Difference]: Without dead ends: 8194 [2022-11-22 02:12:45,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:12:45,126 INFO L413 NwaCegarLoop]: 2814 mSDtfsCounter, 1643 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 1422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 6788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1422 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:45,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1643 Valid, 2826 Invalid, 6788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1422 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-22 02:12:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8194 states. [2022-11-22 02:12:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8194 to 8194. [2022-11-22 02:12:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8194 states, 8193 states have (on average 1.4168192359331135) internal successors, (11608), 8193 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8194 states to 8194 states and 11608 transitions. [2022-11-22 02:12:45,204 INFO L78 Accepts]: Start accepts. Automaton has 8194 states and 11608 transitions. Word has length 1752 [2022-11-22 02:12:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:45,205 INFO L495 AbstractCegarLoop]: Abstraction has 8194 states and 11608 transitions. [2022-11-22 02:12:45,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 584.0) internal successors, (1752), 3 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8194 states and 11608 transitions. [2022-11-22 02:12:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1760 [2022-11-22 02:12:45,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:45,233 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:45,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-22 02:12:45,233 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1243605569, now seen corresponding path program 1 times [2022-11-22 02:12:45,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:45,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293453793] [2022-11-22 02:12:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:12:46,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293453793] [2022-11-22 02:12:46,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293453793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:46,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:12:46,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:12:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146564567] [2022-11-22 02:12:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:46,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:12:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:12:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:12:46,965 INFO L87 Difference]: Start difference. First operand 8194 states and 11608 transitions. Second operand has 3 states, 3 states have (on average 583.0) internal successors, (1749), 3 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:53,174 INFO L93 Difference]: Finished difference Result 19662 states and 27150 transitions. [2022-11-22 02:12:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:12:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 583.0) internal successors, (1749), 3 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1759 [2022-11-22 02:12:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:53,186 INFO L225 Difference]: With dead ends: 19662 [2022-11-22 02:12:53,186 INFO L226 Difference]: Without dead ends: 11470 [2022-11-22 02:12:53,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:12:53,191 INFO L413 NwaCegarLoop]: 2897 mSDtfsCounter, 1632 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5341 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 5539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 5341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:53,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 2909 Invalid, 5539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 5341 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-22 02:12:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11470 states. [2022-11-22 02:12:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 11470. [2022-11-22 02:12:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11470 states, 11469 states have (on average 1.3375185282064697) internal successors, (15340), 11469 states have internal predecessors, (15340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11470 states to 11470 states and 15340 transitions. [2022-11-22 02:12:53,307 INFO L78 Accepts]: Start accepts. Automaton has 11470 states and 15340 transitions. Word has length 1759 [2022-11-22 02:12:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:53,308 INFO L495 AbstractCegarLoop]: Abstraction has 11470 states and 15340 transitions. [2022-11-22 02:12:53,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 583.0) internal successors, (1749), 3 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:12:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11470 states and 15340 transitions. [2022-11-22 02:12:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1766 [2022-11-22 02:12:53,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:53,336 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:53,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-22 02:12:53,337 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash -211508297, now seen corresponding path program 1 times [2022-11-22 02:12:53,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:53,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500409545] [2022-11-22 02:12:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:53,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:12:54,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:54,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500409545] [2022-11-22 02:12:54,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500409545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:54,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:12:54,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:12:54,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122419527] [2022-11-22 02:12:54,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:54,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:12:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:12:54,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:12:54,158 INFO L87 Difference]: Start difference. First operand 11470 states and 15340 transitions. Second operand has 3 states, 3 states have (on average 581.3333333333334) internal successors, (1744), 2 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:01,621 INFO L93 Difference]: Finished difference Result 32766 states and 44371 transitions. [2022-11-22 02:13:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 581.3333333333334) internal successors, (1744), 2 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1765 [2022-11-22 02:13:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:01,645 INFO L225 Difference]: With dead ends: 32766 [2022-11-22 02:13:01,645 INFO L226 Difference]: Without dead ends: 21298 [2022-11-22 02:13:01,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:01,655 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 1600 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4554 mSolverCounterSat, 2253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 6807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2253 IncrementalHoareTripleChecker+Valid, 4554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:01,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 1372 Invalid, 6807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2253 Valid, 4554 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-22 02:13:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21298 states. [2022-11-22 02:13:01,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21298 to 21298. [2022-11-22 02:13:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21298 states, 21297 states have (on average 1.2646382119547355) internal successors, (26933), 21297 states have internal predecessors, (26933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21298 states to 21298 states and 26933 transitions. [2022-11-22 02:13:01,886 INFO L78 Accepts]: Start accepts. Automaton has 21298 states and 26933 transitions. Word has length 1765 [2022-11-22 02:13:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:01,886 INFO L495 AbstractCegarLoop]: Abstraction has 21298 states and 26933 transitions. [2022-11-22 02:13:01,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 581.3333333333334) internal successors, (1744), 2 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 21298 states and 26933 transitions. [2022-11-22 02:13:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1778 [2022-11-22 02:13:01,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:01,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:01,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-22 02:13:01,922 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:01,923 INFO L85 PathProgramCache]: Analyzing trace with hash 289525001, now seen corresponding path program 1 times [2022-11-22 02:13:01,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:01,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084553975] [2022-11-22 02:13:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:13:04,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:04,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084553975] [2022-11-22 02:13:04,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084553975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:04,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:04,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:13:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740209700] [2022-11-22 02:13:04,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:04,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:13:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:13:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:04,858 INFO L87 Difference]: Start difference. First operand 21298 states and 26933 transitions. Second operand has 5 states, 5 states have (on average 348.6) internal successors, (1743), 4 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:28,619 INFO L93 Difference]: Finished difference Result 70437 states and 93695 transitions. [2022-11-22 02:13:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:13:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 348.6) internal successors, (1743), 4 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1777 [2022-11-22 02:13:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:28,670 INFO L225 Difference]: With dead ends: 70437 [2022-11-22 02:13:28,670 INFO L226 Difference]: Without dead ends: 45868 [2022-11-22 02:13:28,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:13:28,691 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 6750 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 17996 mSolverCounterSat, 6228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6750 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 24224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6228 IncrementalHoareTripleChecker+Valid, 17996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:28,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6750 Valid, 700 Invalid, 24224 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6228 Valid, 17996 Invalid, 0 Unknown, 0 Unchecked, 22.8s Time] [2022-11-22 02:13:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45868 states. [2022-11-22 02:13:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45868 to 42592. [2022-11-22 02:13:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42592 states, 42591 states have (on average 1.1514404451644713) internal successors, (49041), 42591 states have internal predecessors, (49041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42592 states to 42592 states and 49041 transitions. [2022-11-22 02:13:29,155 INFO L78 Accepts]: Start accepts. Automaton has 42592 states and 49041 transitions. Word has length 1777 [2022-11-22 02:13:29,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:29,156 INFO L495 AbstractCegarLoop]: Abstraction has 42592 states and 49041 transitions. [2022-11-22 02:13:29,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 348.6) internal successors, (1743), 4 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 42592 states and 49041 transitions. [2022-11-22 02:13:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2023 [2022-11-22 02:13:29,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:29,209 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:29,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-22 02:13:29,209 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash 467919263, now seen corresponding path program 1 times [2022-11-22 02:13:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:29,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894163368] [2022-11-22 02:13:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-11-22 02:13:30,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894163368] [2022-11-22 02:13:30,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894163368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:30,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:30,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:30,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184251972] [2022-11-22 02:13:30,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:30,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:30,503 INFO L87 Difference]: Start difference. First operand 42592 states and 49041 transitions. Second operand has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:38,503 INFO L93 Difference]: Finished difference Result 99924 states and 116180 transitions. [2022-11-22 02:13:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2022 [2022-11-22 02:13:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:38,576 INFO L225 Difference]: With dead ends: 99924 [2022-11-22 02:13:38,576 INFO L226 Difference]: Without dead ends: 57334 [2022-11-22 02:13:38,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:38,600 INFO L413 NwaCegarLoop]: 2840 mSDtfsCounter, 1650 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5778 mSolverCounterSat, 1303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 7081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1303 IncrementalHoareTripleChecker+Valid, 5778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:38,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 2851 Invalid, 7081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1303 Valid, 5778 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-22 02:13:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57334 states. [2022-11-22 02:13:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57334 to 55696. [2022-11-22 02:13:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55696 states, 55695 states have (on average 1.1430110422838675) internal successors, (63660), 55695 states have internal predecessors, (63660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55696 states to 55696 states and 63660 transitions. [2022-11-22 02:13:39,252 INFO L78 Accepts]: Start accepts. Automaton has 55696 states and 63660 transitions. Word has length 2022 [2022-11-22 02:13:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:39,252 INFO L495 AbstractCegarLoop]: Abstraction has 55696 states and 63660 transitions. [2022-11-22 02:13:39,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 55696 states and 63660 transitions. [2022-11-22 02:13:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2046 [2022-11-22 02:13:39,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:39,323 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:39,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-22 02:13:39,323 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash -78279234, now seen corresponding path program 1 times [2022-11-22 02:13:39,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:39,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245072370] [2022-11-22 02:13:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 511 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-22 02:13:40,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245072370] [2022-11-22 02:13:40,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245072370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:40,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:40,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:40,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782553852] [2022-11-22 02:13:40,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:40,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:40,571 INFO L87 Difference]: Start difference. First operand 55696 states and 63660 transitions. Second operand has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:48,630 INFO L93 Difference]: Finished difference Result 134322 states and 156598 transitions. [2022-11-22 02:13:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2045 [2022-11-22 02:13:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:48,752 INFO L225 Difference]: With dead ends: 134322 [2022-11-22 02:13:48,752 INFO L226 Difference]: Without dead ends: 78628 [2022-11-22 02:13:48,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:48,792 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 1840 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4817 mSolverCounterSat, 2019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 6836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2019 IncrementalHoareTripleChecker+Valid, 4817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:48,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 1138 Invalid, 6836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2019 Valid, 4817 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-22 02:13:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78628 states. [2022-11-22 02:13:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78628 to 78628. [2022-11-22 02:13:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78628 states, 78627 states have (on average 1.1579101326516337) internal successors, (91043), 78627 states have internal predecessors, (91043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78628 states to 78628 states and 91043 transitions. [2022-11-22 02:13:49,714 INFO L78 Accepts]: Start accepts. Automaton has 78628 states and 91043 transitions. Word has length 2045 [2022-11-22 02:13:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:49,715 INFO L495 AbstractCegarLoop]: Abstraction has 78628 states and 91043 transitions. [2022-11-22 02:13:49,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 78628 states and 91043 transitions. [2022-11-22 02:13:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2060 [2022-11-22 02:13:49,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:49,802 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:49,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-22 02:13:49,802 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1589364857, now seen corresponding path program 1 times [2022-11-22 02:13:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:49,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543443053] [2022-11-22 02:13:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-11-22 02:13:51,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:51,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543443053] [2022-11-22 02:13:51,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543443053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:51,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:51,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:51,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629540632] [2022-11-22 02:13:51,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:51,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:51,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:51,864 INFO L87 Difference]: Start difference. First operand 78628 states and 91043 transitions. Second operand has 3 states, 3 states have (on average 639.0) internal successors, (1917), 3 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:00,854 INFO L93 Difference]: Finished difference Result 208032 states and 240903 transitions. [2022-11-22 02:14:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:00,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 639.0) internal successors, (1917), 3 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2059 [2022-11-22 02:14:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:01,023 INFO L225 Difference]: With dead ends: 208032 [2022-11-22 02:14:01,023 INFO L226 Difference]: Without dead ends: 129406 [2022-11-22 02:14:01,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:01,075 INFO L413 NwaCegarLoop]: 2830 mSDtfsCounter, 1612 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5063 mSolverCounterSat, 1923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 6986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1923 IncrementalHoareTripleChecker+Valid, 5063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:01,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 2842 Invalid, 6986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1923 Valid, 5063 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-22 02:14:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129406 states. [2022-11-22 02:14:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129406 to 124492. [2022-11-22 02:14:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124492 states, 124491 states have (on average 1.127350571527259) internal successors, (140345), 124491 states have internal predecessors, (140345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124492 states to 124492 states and 140345 transitions. [2022-11-22 02:14:02,801 INFO L78 Accepts]: Start accepts. Automaton has 124492 states and 140345 transitions. Word has length 2059 [2022-11-22 02:14:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:02,801 INFO L495 AbstractCegarLoop]: Abstraction has 124492 states and 140345 transitions. [2022-11-22 02:14:02,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 639.0) internal successors, (1917), 3 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 124492 states and 140345 transitions. [2022-11-22 02:14:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2077 [2022-11-22 02:14:02,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:02,921 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:02,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-22 02:14:02,921 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash 525288421, now seen corresponding path program 1 times [2022-11-22 02:14:02,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:02,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736958415] [2022-11-22 02:14:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:02,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 625 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-22 02:14:05,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:05,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736958415] [2022-11-22 02:14:05,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736958415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:05,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:05,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:05,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453294478] [2022-11-22 02:14:05,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:05,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:05,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:05,907 INFO L87 Difference]: Start difference. First operand 124492 states and 140345 transitions. Second operand has 3 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:13,308 INFO L93 Difference]: Finished difference Result 252258 states and 284078 transitions. [2022-11-22 02:14:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2076 [2022-11-22 02:14:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:13,457 INFO L225 Difference]: With dead ends: 252258 [2022-11-22 02:14:13,457 INFO L226 Difference]: Without dead ends: 127768 [2022-11-22 02:14:13,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:13,506 INFO L413 NwaCegarLoop]: 3019 mSDtfsCounter, 1610 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5452 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 5452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:13,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 3031 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 5452 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-22 02:14:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127768 states. [2022-11-22 02:14:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127768 to 126130. [2022-11-22 02:14:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126130 states, 126129 states have (on average 1.1239366045873669) internal successors, (141761), 126129 states have internal predecessors, (141761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126130 states to 126130 states and 141761 transitions. [2022-11-22 02:14:15,383 INFO L78 Accepts]: Start accepts. Automaton has 126130 states and 141761 transitions. Word has length 2076 [2022-11-22 02:14:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:15,385 INFO L495 AbstractCegarLoop]: Abstraction has 126130 states and 141761 transitions. [2022-11-22 02:14:15,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 126130 states and 141761 transitions. [2022-11-22 02:14:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2140 [2022-11-22 02:14:15,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:15,806 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:15,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-22 02:14:15,807 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:15,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1902093448, now seen corresponding path program 1 times [2022-11-22 02:14:15,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954428897] [2022-11-22 02:14:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat