./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh --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 48c664e7cdd48f925f0c21709ed46b226b726e91974047076ebfec19f49c351c --- 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-2329fc7 [2022-12-14 14:52:30,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:52:30,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:52:30,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:52:30,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:52:30,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:52:30,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:52:30,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:52:30,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:52:30,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:52:30,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:52:30,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:52:30,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:52:30,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:52:30,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:52:30,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:52:30,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:52:30,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:52:30,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:52:30,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:52:30,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:52:30,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:52:30,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:52:30,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:52:30,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:52:30,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:52:30,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:52:30,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:52:30,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:52:30,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:52:30,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:52:30,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:52:30,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:52:30,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:52:30,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:52:30,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:52:30,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:52:30,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:52:30,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:52:30,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:52:30,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:52:30,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:52:30,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:52:30,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:52:30,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:52:30,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:52:30,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:52:30,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:52:30,841 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:52:30,841 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:52:30,841 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:52:30,841 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:52:30,841 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:52:30,842 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:52:30,842 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:52:30,842 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:52:30,842 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:52:30,842 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:52:30,843 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:52:30,843 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:52:30,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:52:30,844 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:52:30,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:52:30,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:52:30,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:52:30,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:52:30,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:52:30,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:52:30,845 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:52:30,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:52:30,845 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:52:30,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:52:30,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:52:30,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:52:30,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:52:30,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:52:30,846 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:52:30,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:52:30,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:52:30,846 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:52:30,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:52:30,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:52:30,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:52:30,847 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_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48c664e7cdd48f925f0c21709ed46b226b726e91974047076ebfec19f49c351c [2022-12-14 14:52:31,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:52:31,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:52:31,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:52:31,031 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:52:31,031 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:52:31,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2022-12-14 14:52:33,652 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:52:33,802 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:52:33,803 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2022-12-14 14:52:33,810 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/data/0e4394ba8/2fa68af987d94ab99da9de220de3cbe4/FLAGf4e7a2835 [2022-12-14 14:52:33,820 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/data/0e4394ba8/2fa68af987d94ab99da9de220de3cbe4 [2022-12-14 14:52:33,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:52:33,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:52:33,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:52:33,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:52:33,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:52:33,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:33" (1/1) ... [2022-12-14 14:52:33,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a34c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:33, skipping insertion in model container [2022-12-14 14:52:33,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:33" (1/1) ... [2022-12-14 14:52:33,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:52:33,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:52:34,033 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_0085de25-b54d-4999-9689-4fa510eb0b02/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c[8604,8617] [2022-12-14 14:52:34,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:52:34,077 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:52:34,124 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_0085de25-b54d-4999-9689-4fa510eb0b02/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c[8604,8617] [2022-12-14 14:52:34,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:52:34,155 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:52:34,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34 WrapperNode [2022-12-14 14:52:34,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:52:34,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:52:34,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:52:34,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:52:34,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,196 INFO L138 Inliner]: procedures = 27, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 661 [2022-12-14 14:52:34,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:52:34,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:52:34,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:52:34,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:52:34,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:52:34,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:52:34,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:52:34,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:52:34,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (1/1) ... [2022-12-14 14:52:34,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:52:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:34,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:52:34,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:52:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:52:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:52:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:52:34,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:52:34,415 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:52:34,416 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:52:34,924 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:52:35,072 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:52:35,072 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 14:52:35,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:35 BoogieIcfgContainer [2022-12-14 14:52:35,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:52:35,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:52:35,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:52:35,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:52:35,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:52:33" (1/3) ... [2022-12-14 14:52:35,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705ce81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:35, skipping insertion in model container [2022-12-14 14:52:35,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:34" (2/3) ... [2022-12-14 14:52:35,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705ce81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:35, skipping insertion in model container [2022-12-14 14:52:35,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:35" (3/3) ... [2022-12-14 14:52:35,083 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2022-12-14 14:52:35,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:52:35,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:52:35,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:52:35,156 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;@af0729b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:52:35,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:52:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 120 states have (on average 1.775) internal successors, (213), 122 states have internal predecessors, (213), 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) [2022-12-14 14:52:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 14:52:35,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:35,171 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] [2022-12-14 14:52:35,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1672398169, now seen corresponding path program 1 times [2022-12-14 14:52:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002989765] [2022-12-14 14:52:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:35,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:35,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002989765] [2022-12-14 14:52:35,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002989765] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:35,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:35,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:35,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509747911] [2022-12-14 14:52:35,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:35,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:35,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:35,552 INFO L87 Difference]: Start difference. First operand has 123 states, 120 states have (on average 1.775) internal successors, (213), 122 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-12-14 14:52:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:35,654 INFO L93 Difference]: Finished difference Result 239 states and 383 transitions. [2022-12-14 14:52:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:35,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2022-12-14 14:52:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:35,667 INFO L225 Difference]: With dead ends: 239 [2022-12-14 14:52:35,667 INFO L226 Difference]: Without dead ends: 173 [2022-12-14 14:52:35,670 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 [2022-12-14 14:52:35,674 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 141 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:35,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 346 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:52:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-12-14 14:52:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-12-14 14:52:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.311764705882353) internal successors, (223), 170 states have internal predecessors, (223), 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) [2022-12-14 14:52:35,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-12-14 14:52:35,732 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 84 [2022-12-14 14:52:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:35,733 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-12-14 14:52:35,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-12-14 14:52:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-12-14 14:52:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 14:52:35,738 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:35,739 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] [2022-12-14 14:52:35,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:52:35,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1616553015, now seen corresponding path program 1 times [2022-12-14 14:52:35,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:35,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704725083] [2022-12-14 14:52:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:35,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:35,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:35,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704725083] [2022-12-14 14:52:35,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704725083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:35,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:35,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:35,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950904260] [2022-12-14 14:52:35,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:35,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:35,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:35,871 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-12-14 14:52:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:35,946 INFO L93 Difference]: Finished difference Result 379 states and 531 transitions. [2022-12-14 14:52:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2022-12-14 14:52:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:35,948 INFO L225 Difference]: With dead ends: 379 [2022-12-14 14:52:35,948 INFO L226 Difference]: Without dead ends: 271 [2022-12-14 14:52:35,949 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 [2022-12-14 14:52:35,950 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 76 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:35,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 274 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-12-14 14:52:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2022-12-14 14:52:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.373134328358209) internal successors, (368), 268 states have internal predecessors, (368), 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) [2022-12-14 14:52:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 368 transitions. [2022-12-14 14:52:35,971 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 368 transitions. Word has length 87 [2022-12-14 14:52:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:35,972 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 368 transitions. [2022-12-14 14:52:35,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-12-14 14:52:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 368 transitions. [2022-12-14 14:52:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 14:52:35,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:35,973 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] [2022-12-14 14:52:35,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:52:35,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:35,974 INFO L85 PathProgramCache]: Analyzing trace with hash 450808550, now seen corresponding path program 1 times [2022-12-14 14:52:35,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:35,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515301927] [2022-12-14 14:52:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:35,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:36,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:36,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515301927] [2022-12-14 14:52:36,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515301927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:36,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:36,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:36,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010792116] [2022-12-14 14:52:36,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:36,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:36,067 INFO L87 Difference]: Start difference. First operand 269 states and 368 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:36,155 INFO L93 Difference]: Finished difference Result 665 states and 954 transitions. [2022-12-14 14:52:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-12-14 14:52:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:36,159 INFO L225 Difference]: With dead ends: 665 [2022-12-14 14:52:36,159 INFO L226 Difference]: Without dead ends: 459 [2022-12-14 14:52:36,160 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 [2022-12-14 14:52:36,161 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 71 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:36,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 270 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-12-14 14:52:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2022-12-14 14:52:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.412280701754386) internal successors, (644), 456 states have internal predecessors, (644), 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) [2022-12-14 14:52:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 644 transitions. [2022-12-14 14:52:36,221 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 644 transitions. Word has length 90 [2022-12-14 14:52:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:36,222 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 644 transitions. [2022-12-14 14:52:36,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 644 transitions. [2022-12-14 14:52:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 14:52:36,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:36,224 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] [2022-12-14 14:52:36,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:52:36,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:36,225 INFO L85 PathProgramCache]: Analyzing trace with hash -367257484, now seen corresponding path program 1 times [2022-12-14 14:52:36,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:36,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689776738] [2022-12-14 14:52:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:36,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:36,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:36,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689776738] [2022-12-14 14:52:36,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689776738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:36,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:36,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520585482] [2022-12-14 14:52:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:36,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:36,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:36,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:36,338 INFO L87 Difference]: Start difference. First operand 457 states and 644 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2022-12-14 14:52:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:36,455 INFO L93 Difference]: Finished difference Result 1213 states and 1758 transitions. [2022-12-14 14:52:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-12-14 14:52:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:36,458 INFO L225 Difference]: With dead ends: 1213 [2022-12-14 14:52:36,459 INFO L226 Difference]: Without dead ends: 819 [2022-12-14 14:52:36,460 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 [2022-12-14 14:52:36,462 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 66 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:36,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 266 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-12-14 14:52:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 817. [2022-12-14 14:52:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 1.4313725490196079) internal successors, (1168), 816 states have internal predecessors, (1168), 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) [2022-12-14 14:52:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1168 transitions. [2022-12-14 14:52:36,538 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1168 transitions. Word has length 93 [2022-12-14 14:52:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:36,538 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1168 transitions. [2022-12-14 14:52:36,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2022-12-14 14:52:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1168 transitions. [2022-12-14 14:52:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 14:52:36,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:36,540 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] [2022-12-14 14:52:36,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:52:36,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:36,541 INFO L85 PathProgramCache]: Analyzing trace with hash -438082678, now seen corresponding path program 1 times [2022-12-14 14:52:36,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:36,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543738301] [2022-12-14 14:52:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:36,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:36,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:36,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543738301] [2022-12-14 14:52:36,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543738301] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:36,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:36,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:36,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314414549] [2022-12-14 14:52:36,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:36,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:36,636 INFO L87 Difference]: Start difference. First operand 817 states and 1168 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-12-14 14:52:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:36,840 INFO L93 Difference]: Finished difference Result 2261 states and 3282 transitions. [2022-12-14 14:52:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:36,841 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), 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 96 [2022-12-14 14:52:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:36,846 INFO L225 Difference]: With dead ends: 2261 [2022-12-14 14:52:36,846 INFO L226 Difference]: Without dead ends: 1507 [2022-12-14 14:52:36,847 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 [2022-12-14 14:52:36,848 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 61 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:36,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 262 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-12-14 14:52:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2022-12-14 14:52:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.4361702127659575) internal successors, (2160), 1504 states have internal predecessors, (2160), 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) [2022-12-14 14:52:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2160 transitions. [2022-12-14 14:52:37,009 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2160 transitions. Word has length 96 [2022-12-14 14:52:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:37,009 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2160 transitions. [2022-12-14 14:52:37,009 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), 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) [2022-12-14 14:52:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2160 transitions. [2022-12-14 14:52:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 14:52:37,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:37,011 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] [2022-12-14 14:52:37,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:52:37,011 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash -502216396, now seen corresponding path program 1 times [2022-12-14 14:52:37,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:37,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474846750] [2022-12-14 14:52:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:37,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:37,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:37,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474846750] [2022-12-14 14:52:37,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474846750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:37,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:37,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:37,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565854046] [2022-12-14 14:52:37,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:37,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:37,084 INFO L87 Difference]: Start difference. First operand 1505 states and 2160 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-12-14 14:52:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:37,336 INFO L93 Difference]: Finished difference Result 4261 states and 6162 transitions. [2022-12-14 14:52:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 99 [2022-12-14 14:52:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:37,343 INFO L225 Difference]: With dead ends: 4261 [2022-12-14 14:52:37,343 INFO L226 Difference]: Without dead ends: 2819 [2022-12-14 14:52:37,345 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 [2022-12-14 14:52:37,345 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 56 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:37,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 258 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2022-12-14 14:52:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2817. [2022-12-14 14:52:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 1.4318181818181819) internal successors, (4032), 2816 states have internal predecessors, (4032), 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) [2022-12-14 14:52:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 4032 transitions. [2022-12-14 14:52:37,530 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 4032 transitions. Word has length 99 [2022-12-14 14:52:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:37,530 INFO L495 AbstractCegarLoop]: Abstraction has 2817 states and 4032 transitions. [2022-12-14 14:52:37,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-12-14 14:52:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 4032 transitions. [2022-12-14 14:52:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 14:52:37,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:37,531 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] [2022-12-14 14:52:37,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:52:37,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1826941030, now seen corresponding path program 1 times [2022-12-14 14:52:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661625468] [2022-12-14 14:52:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:37,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:37,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661625468] [2022-12-14 14:52:37,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661625468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:37,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:37,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:37,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453661558] [2022-12-14 14:52:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:37,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:37,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:37,599 INFO L87 Difference]: Start difference. First operand 2817 states and 4032 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:38,146 INFO L93 Difference]: Finished difference Result 8069 states and 11586 transitions. [2022-12-14 14:52:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-12-14 14:52:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:38,160 INFO L225 Difference]: With dead ends: 8069 [2022-12-14 14:52:38,160 INFO L226 Difference]: Without dead ends: 5315 [2022-12-14 14:52:38,163 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 [2022-12-14 14:52:38,164 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 51 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:38,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 254 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2022-12-14 14:52:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5313. [2022-12-14 14:52:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 1.4216867469879517) internal successors, (7552), 5312 states have internal predecessors, (7552), 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) [2022-12-14 14:52:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 7552 transitions. [2022-12-14 14:52:38,622 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 7552 transitions. Word has length 102 [2022-12-14 14:52:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:38,622 INFO L495 AbstractCegarLoop]: Abstraction has 5313 states and 7552 transitions. [2022-12-14 14:52:38,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 7552 transitions. [2022-12-14 14:52:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 14:52:38,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:38,623 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] [2022-12-14 14:52:38,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:52:38,623 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1808233316, now seen corresponding path program 1 times [2022-12-14 14:52:38,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:38,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721059596] [2022-12-14 14:52:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:38,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:38,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721059596] [2022-12-14 14:52:38,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721059596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:38,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:38,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468208711] [2022-12-14 14:52:38,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:38,713 INFO L87 Difference]: Start difference. First operand 5313 states and 7552 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-12-14 14:52:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:39,632 INFO L93 Difference]: Finished difference Result 15301 states and 21762 transitions. [2022-12-14 14:52:39,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:39,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-12-14 14:52:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:39,653 INFO L225 Difference]: With dead ends: 15301 [2022-12-14 14:52:39,653 INFO L226 Difference]: Without dead ends: 10051 [2022-12-14 14:52:39,658 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 [2022-12-14 14:52:39,659 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 46 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:39,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 250 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10051 states. [2022-12-14 14:52:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10051 to 10049. [2022-12-14 14:52:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10049 states, 10048 states have (on average 1.4076433121019107) internal successors, (14144), 10048 states have internal predecessors, (14144), 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) [2022-12-14 14:52:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10049 states to 10049 states and 14144 transitions. [2022-12-14 14:52:40,615 INFO L78 Accepts]: Start accepts. Automaton has 10049 states and 14144 transitions. Word has length 105 [2022-12-14 14:52:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:40,615 INFO L495 AbstractCegarLoop]: Abstraction has 10049 states and 14144 transitions. [2022-12-14 14:52:40,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-12-14 14:52:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 10049 states and 14144 transitions. [2022-12-14 14:52:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 14:52:40,616 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:40,616 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] [2022-12-14 14:52:40,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:52:40,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:40,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1033855043, now seen corresponding path program 1 times [2022-12-14 14:52:40,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:40,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899649228] [2022-12-14 14:52:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:40,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:40,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:40,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899649228] [2022-12-14 14:52:40,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899649228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:40,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:40,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 14:52:40,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361966384] [2022-12-14 14:52:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:40,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 14:52:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 14:52:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:52:40,810 INFO L87 Difference]: Start difference. First operand 10049 states and 14144 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 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) [2022-12-14 14:52:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:44,381 INFO L93 Difference]: Finished difference Result 39539 states and 56053 transitions. [2022-12-14 14:52:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 14:52:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 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 108 [2022-12-14 14:52:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:44,437 INFO L225 Difference]: With dead ends: 39539 [2022-12-14 14:52:44,437 INFO L226 Difference]: Without dead ends: 29553 [2022-12-14 14:52:44,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-12-14 14:52:44,449 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1473 mSDsluCounter, 4708 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 4843 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:44,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1473 Valid, 4843 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:52:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29553 states. [2022-12-14 14:52:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29553 to 12861. [2022-12-14 14:52:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12861 states, 12860 states have (on average 1.3980559875583203) internal successors, (17979), 12860 states have internal predecessors, (17979), 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) [2022-12-14 14:52:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 17979 transitions. [2022-12-14 14:52:46,282 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 17979 transitions. Word has length 108 [2022-12-14 14:52:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:46,283 INFO L495 AbstractCegarLoop]: Abstraction has 12861 states and 17979 transitions. [2022-12-14 14:52:46,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 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) [2022-12-14 14:52:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 17979 transitions. [2022-12-14 14:52:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 14:52:46,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:46,283 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] [2022-12-14 14:52:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:52:46,284 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash 496436798, now seen corresponding path program 1 times [2022-12-14 14:52:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471077955] [2022-12-14 14:52:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:46,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:46,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:46,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471077955] [2022-12-14 14:52:46,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471077955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:46,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:46,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 14:52:46,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749212865] [2022-12-14 14:52:46,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:46,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 14:52:46,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 14:52:46,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:52:46,641 INFO L87 Difference]: Start difference. First operand 12861 states and 17979 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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) [2022-12-14 14:52:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:48,272 INFO L93 Difference]: Finished difference Result 25661 states and 35896 transitions. [2022-12-14 14:52:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 14:52:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 110 [2022-12-14 14:52:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:48,292 INFO L225 Difference]: With dead ends: 25661 [2022-12-14 14:52:48,292 INFO L226 Difference]: Without dead ends: 12863 [2022-12-14 14:52:48,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:52:48,302 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 146 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:48,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 725 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:52:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12863 states. [2022-12-14 14:52:49,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12863 to 12861. [2022-12-14 14:52:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12861 states, 12860 states have (on average 1.3979782270606531) internal successors, (17978), 12860 states have internal predecessors, (17978), 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) [2022-12-14 14:52:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 17978 transitions. [2022-12-14 14:52:49,792 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 17978 transitions. Word has length 110 [2022-12-14 14:52:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:49,793 INFO L495 AbstractCegarLoop]: Abstraction has 12861 states and 17978 transitions. [2022-12-14 14:52:49,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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) [2022-12-14 14:52:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 17978 transitions. [2022-12-14 14:52:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 14:52:49,793 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:49,794 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] [2022-12-14 14:52:49,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:52:49,794 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:49,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash 475434143, now seen corresponding path program 1 times [2022-12-14 14:52:49,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:49,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139031172] [2022-12-14 14:52:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:49,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:49,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139031172] [2022-12-14 14:52:49,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139031172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:49,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:49,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:49,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715775773] [2022-12-14 14:52:49,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:49,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:49,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:49,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:49,858 INFO L87 Difference]: Start difference. First operand 12861 states and 17978 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2022-12-14 14:52:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:51,993 INFO L93 Difference]: Finished difference Result 32955 states and 46322 transitions. [2022-12-14 14:52:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:51,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2022-12-14 14:52:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:52,014 INFO L225 Difference]: With dead ends: 32955 [2022-12-14 14:52:52,015 INFO L226 Difference]: Without dead ends: 20157 [2022-12-14 14:52:52,025 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 [2022-12-14 14:52:52,025 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 40 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:52,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 211 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2022-12-14 14:52:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20155. [2022-12-14 14:52:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.4030465416294533) internal successors, (28277), 20154 states have internal predecessors, (28277), 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) [2022-12-14 14:52:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 28277 transitions. [2022-12-14 14:52:54,389 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 28277 transitions. Word has length 110 [2022-12-14 14:52:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:54,390 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 28277 transitions. [2022-12-14 14:52:54,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2022-12-14 14:52:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 28277 transitions. [2022-12-14 14:52:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:52:54,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:54,391 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] [2022-12-14 14:52:54,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 14:52:54,391 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:54,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1792237672, now seen corresponding path program 1 times [2022-12-14 14:52:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:54,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670602830] [2022-12-14 14:52:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:54,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:54,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:54,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670602830] [2022-12-14 14:52:54,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670602830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:54,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:54,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:52:54,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672447731] [2022-12-14 14:52:54,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:54,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:52:54,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:54,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:52:54,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:52:54,487 INFO L87 Difference]: Start difference. First operand 20155 states and 28277 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:52:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:57,208 INFO L93 Difference]: Finished difference Result 40245 states and 56489 transitions. [2022-12-14 14:52:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:52:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 14:52:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:57,230 INFO L225 Difference]: With dead ends: 40245 [2022-12-14 14:52:57,230 INFO L226 Difference]: Without dead ends: 20155 [2022-12-14 14:52:57,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:52:57,245 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 340 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:57,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 108 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2022-12-14 14:53:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2022-12-14 14:53:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3903443485164235) internal successors, (28021), 20154 states have internal predecessors, (28021), 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) [2022-12-14 14:53:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 28021 transitions. [2022-12-14 14:53:00,521 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 28021 transitions. Word has length 111 [2022-12-14 14:53:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:00,521 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 28021 transitions. [2022-12-14 14:53:00,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 28021 transitions. [2022-12-14 14:53:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:53:00,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:00,522 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] [2022-12-14 14:53:00,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 14:53:00,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:00,523 INFO L85 PathProgramCache]: Analyzing trace with hash 761312509, now seen corresponding path program 1 times [2022-12-14 14:53:00,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:00,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12502464] [2022-12-14 14:53:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:00,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:53:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:53:00,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:53:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12502464] [2022-12-14 14:53:00,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12502464] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:53:00,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:53:00,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:53:00,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712998485] [2022-12-14 14:53:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:53:00,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:53:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:53:00,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:53:00,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:53:00,629 INFO L87 Difference]: Start difference. First operand 20155 states and 28021 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:53:03,467 INFO L93 Difference]: Finished difference Result 40247 states and 55978 transitions. [2022-12-14 14:53:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:53:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 14:53:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:53:03,489 INFO L225 Difference]: With dead ends: 40247 [2022-12-14 14:53:03,489 INFO L226 Difference]: Without dead ends: 20157 [2022-12-14 14:53:03,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:53:03,505 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 508 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:53:03,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 129 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:53:03,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2022-12-14 14:53:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20155. [2022-12-14 14:53:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.377642155403394) internal successors, (27765), 20154 states have internal predecessors, (27765), 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) [2022-12-14 14:53:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27765 transitions. [2022-12-14 14:53:06,253 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27765 transitions. Word has length 111 [2022-12-14 14:53:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:06,253 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 27765 transitions. [2022-12-14 14:53:06,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27765 transitions. [2022-12-14 14:53:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:53:06,254 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:06,254 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] [2022-12-14 14:53:06,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 14:53:06,254 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:06,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1787228126, now seen corresponding path program 1 times [2022-12-14 14:53:06,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:06,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600947502] [2022-12-14 14:53:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:06,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:53:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:53:06,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:53:06,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600947502] [2022-12-14 14:53:06,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600947502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:53:06,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:53:06,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:53:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195989175] [2022-12-14 14:53:06,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:53:06,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:53:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:53:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:53:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:53:06,329 INFO L87 Difference]: Start difference. First operand 20155 states and 27765 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:53:09,840 INFO L93 Difference]: Finished difference Result 40245 states and 55465 transitions. [2022-12-14 14:53:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:53:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 14:53:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:53:09,862 INFO L225 Difference]: With dead ends: 40245 [2022-12-14 14:53:09,862 INFO L226 Difference]: Without dead ends: 20155 [2022-12-14 14:53:09,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:53:09,874 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 298 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:53:09,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 132 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:53:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2022-12-14 14:53:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2022-12-14 14:53:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3677185670338394) internal successors, (27565), 20154 states have internal predecessors, (27565), 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) [2022-12-14 14:53:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27565 transitions. [2022-12-14 14:53:12,772 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27565 transitions. Word has length 111 [2022-12-14 14:53:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:12,773 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 27565 transitions. [2022-12-14 14:53:12,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27565 transitions. [2022-12-14 14:53:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:53:12,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:12,773 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] [2022-12-14 14:53:12,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 14:53:12,774 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1659142819, now seen corresponding path program 1 times [2022-12-14 14:53:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:12,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474038042] [2022-12-14 14:53:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:53:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:53:12,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:53:12,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474038042] [2022-12-14 14:53:12,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474038042] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:53:12,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:53:12,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:53:12,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947946513] [2022-12-14 14:53:12,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:53:12,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:53:12,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:53:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:53:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:53:12,841 INFO L87 Difference]: Start difference. First operand 20155 states and 27565 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:53:16,016 INFO L93 Difference]: Finished difference Result 40245 states and 55065 transitions. [2022-12-14 14:53:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:53:16,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 14:53:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:53:16,041 INFO L225 Difference]: With dead ends: 40245 [2022-12-14 14:53:16,042 INFO L226 Difference]: Without dead ends: 20155 [2022-12-14 14:53:16,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:53:16,058 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 321 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:53:16,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 116 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:53:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2022-12-14 14:53:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2022-12-14 14:53:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3566041480599385) internal successors, (27341), 20154 states have internal predecessors, (27341), 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) [2022-12-14 14:53:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27341 transitions. [2022-12-14 14:53:19,214 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27341 transitions. Word has length 111 [2022-12-14 14:53:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:19,214 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 27341 transitions. [2022-12-14 14:53:19,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27341 transitions. [2022-12-14 14:53:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:53:19,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:19,215 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] [2022-12-14 14:53:19,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 14:53:19,215 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1290871592, now seen corresponding path program 1 times [2022-12-14 14:53:19,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:19,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247024984] [2022-12-14 14:53:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:19,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:53:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:53:19,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:53:19,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247024984] [2022-12-14 14:53:19,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247024984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:53:19,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:53:19,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:53:19,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105530326] [2022-12-14 14:53:19,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:53:19,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:53:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:53:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:53:19,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:53:19,284 INFO L87 Difference]: Start difference. First operand 20155 states and 27341 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:53:22,848 INFO L93 Difference]: Finished difference Result 40245 states and 54617 transitions. [2022-12-14 14:53:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:53:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 14:53:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:53:22,870 INFO L225 Difference]: With dead ends: 40245 [2022-12-14 14:53:22,870 INFO L226 Difference]: Without dead ends: 20155 [2022-12-14 14:53:22,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:53:22,885 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 344 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:53:22,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 100 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:53:22,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2022-12-14 14:53:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2022-12-14 14:53:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3407264066686513) internal successors, (27021), 20154 states have internal predecessors, (27021), 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) [2022-12-14 14:53:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27021 transitions. [2022-12-14 14:53:26,562 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27021 transitions. Word has length 111 [2022-12-14 14:53:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:26,562 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 27021 transitions. [2022-12-14 14:53:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27021 transitions. [2022-12-14 14:53:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:53:26,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:26,563 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] [2022-12-14 14:53:26,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 14:53:26,563 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:26,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1652990317, now seen corresponding path program 1 times [2022-12-14 14:53:26,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:26,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843117492] [2022-12-14 14:53:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:26,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:53:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:53:26,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:53:26,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843117492] [2022-12-14 14:53:26,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843117492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:53:26,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:53:26,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:53:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328663182] [2022-12-14 14:53:26,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:53:26,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:53:26,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:53:26,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:53:26,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:53:26,636 INFO L87 Difference]: Start difference. First operand 20155 states and 27021 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:53:30,420 INFO L93 Difference]: Finished difference Result 40245 states and 53977 transitions. [2022-12-14 14:53:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:53:30,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 14:53:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:53:30,441 INFO L225 Difference]: With dead ends: 40245 [2022-12-14 14:53:30,442 INFO L226 Difference]: Without dead ends: 20155 [2022-12-14 14:53:30,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:53:30,455 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 263 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:53:30,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 148 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:53:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2022-12-14 14:53:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2022-12-14 14:53:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3311005259501836) internal successors, (26827), 20154 states have internal predecessors, (26827), 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) [2022-12-14 14:53:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 26827 transitions. [2022-12-14 14:53:34,001 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 26827 transitions. Word has length 111 [2022-12-14 14:53:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:34,001 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 26827 transitions. [2022-12-14 14:53:34,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 14:53:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 26827 transitions. [2022-12-14 14:53:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:53:34,002 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:34,002 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] [2022-12-14 14:53:34,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 14:53:34,002 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2112686478, now seen corresponding path program 1 times [2022-12-14 14:53:34,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:34,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221738862] [2022-12-14 14:53:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:53:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:53:34,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:53:34,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221738862] [2022-12-14 14:53:34,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221738862] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:53:34,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:53:34,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:53:34,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134876118] [2022-12-14 14:53:34,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:53:34,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:53:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:53:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:53:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:53:34,145 INFO L87 Difference]: Start difference. First operand 20155 states and 26827 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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) [2022-12-14 14:53:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:53:40,532 INFO L93 Difference]: Finished difference Result 34674 states and 45825 transitions. [2022-12-14 14:53:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:53:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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 111 [2022-12-14 14:53:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:53:40,573 INFO L225 Difference]: With dead ends: 34674 [2022-12-14 14:53:40,573 INFO L226 Difference]: Without dead ends: 34672 [2022-12-14 14:53:40,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:53:40,581 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 145 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:53:40,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 646 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:53:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34672 states. [2022-12-14 14:53:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34672 to 20667. [2022-12-14 14:53:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20667 states, 20666 states have (on average 1.3043162682667182) internal successors, (26955), 20666 states have internal predecessors, (26955), 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) [2022-12-14 14:53:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20667 states to 20667 states and 26955 transitions. [2022-12-14 14:53:45,043 INFO L78 Accepts]: Start accepts. Automaton has 20667 states and 26955 transitions. Word has length 111 [2022-12-14 14:53:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:45,043 INFO L495 AbstractCegarLoop]: Abstraction has 20667 states and 26955 transitions. [2022-12-14 14:53:45,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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) [2022-12-14 14:53:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 20667 states and 26955 transitions. [2022-12-14 14:53:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:53:45,045 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:45,045 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:53:45,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 14:53:45,046 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:45,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1661345098, now seen corresponding path program 1 times [2022-12-14 14:53:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:45,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997392563] [2022-12-14 14:53:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:45,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:54:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:54:14,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:54:14,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997392563] [2022-12-14 14:54:14,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997392563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:54:14,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536497521] [2022-12-14 14:54:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:54:14,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:54:14,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:54:14,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:54:14,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0085de25-b54d-4999-9689-4fa510eb0b02/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:54:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:54:14,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 127 conjunts are in the unsatisfiable core [2022-12-14 14:54:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:55:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:55:18,537 INFO L328 TraceCheckSpWp]: Computing backward predicates...