./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/psyco/psyco_net_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/psyco/psyco_net_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0 --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 de2f4457e683c9057510f44fdcfcada297661f8afdeccfe707ab5df57f434b62 --- 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-e04fb08 [2022-11-16 19:26:05,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:26:05,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:26:05,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:26:05,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:26:05,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:26:05,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:26:05,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:26:05,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:26:05,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:26:05,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:26:05,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:26:05,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:26:05,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:26:05,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:26:05,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:26:05,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:26:05,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:26:05,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:26:05,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:26:05,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:26:05,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:26:05,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:26:05,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:26:05,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:26:05,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:26:05,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:26:05,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:26:05,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:26:05,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:26:05,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:26:05,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:26:05,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:26:05,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:26:05,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:26:05,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:26:05,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:26:05,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:26:05,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:26:05,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:26:05,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:26:05,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:26:05,174 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:26:05,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:26:05,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:26:05,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:26:05,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:26:05,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:26:05,176 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:26:05,176 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:26:05,176 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:26:05,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:26:05,177 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:26:05,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:26:05,177 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:26:05,178 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:26:05,178 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:26:05,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:26:05,179 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:26:05,179 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:26:05,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:26:05,180 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:26:05,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:26:05,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:26:05,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:26:05,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:26:05,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:26:05,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:26:05,181 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:26:05,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:26:05,182 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:26:05,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:26:05,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:26:05,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:26:05,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:26:05,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:26:05,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:26:05,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:26:05,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:26:05,184 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:26:05,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:26:05,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:26:05,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:26:05,184 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_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de2f4457e683c9057510f44fdcfcada297661f8afdeccfe707ab5df57f434b62 [2022-11-16 19:26:05,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:26:05,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:26:05,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:26:05,518 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:26:05,518 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:26:05,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/psyco/psyco_net_1.c [2022-11-16 19:26:05,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/data/d94530010/8a5d15786aad4c22bfa207d7984d0178/FLAGa349e1544 [2022-11-16 19:26:07,151 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:26:07,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/sv-benchmarks/c/psyco/psyco_net_1.c [2022-11-16 19:26:07,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/data/d94530010/8a5d15786aad4c22bfa207d7984d0178/FLAGa349e1544 [2022-11-16 19:26:07,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/data/d94530010/8a5d15786aad4c22bfa207d7984d0178 [2022-11-16 19:26:07,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:26:07,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:26:07,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:26:07,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:26:07,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:26:07,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:26:07" (1/1) ... [2022-11-16 19:26:07,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e31ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:07, skipping insertion in model container [2022-11-16 19:26:07,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:26:07" (1/1) ... [2022-11-16 19:26:07,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:26:08,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:26:09,830 WARN L229 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_16ba56a4-7304-4178-b24d-caaa7cd31406/sv-benchmarks/c/psyco/psyco_net_1.c[2349407,2349420] [2022-11-16 19:26:09,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:26:09,903 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:26:10,997 WARN L229 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_16ba56a4-7304-4178-b24d-caaa7cd31406/sv-benchmarks/c/psyco/psyco_net_1.c[2349407,2349420] [2022-11-16 19:26:11,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:26:11,043 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:26:11,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11 WrapperNode [2022-11-16 19:26:11,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:26:11,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:26:11,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:26:11,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:26:11,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:11,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:12,514 INFO L138 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50075 [2022-11-16 19:26:12,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:26:12,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:26:12,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:26:12,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:26:12,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:12,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:12,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:12,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:13,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:13,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:13,496 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:13,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:13,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:26:13,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:26:13,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:26:13,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:26:13,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (1/1) ... [2022-11-16 19:26:13,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:26:13,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:13,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:26:13,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ba56a4-7304-4178-b24d-caaa7cd31406/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:26:13,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:26:13,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:26:13,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:26:13,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:26:14,793 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:26:14,795 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:26:32,654 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:26:32,780 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:26:32,780 INFO L300 CfgBuilder]: Removed 1130 assume(true) statements. [2022-11-16 19:26:32,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:26:32 BoogieIcfgContainer [2022-11-16 19:26:32,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:26:32,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:26:32,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:26:32,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:26:32,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:26:07" (1/3) ... [2022-11-16 19:26:32,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c191e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:26:32, skipping insertion in model container [2022-11-16 19:26:32,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:26:11" (2/3) ... [2022-11-16 19:26:32,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c191e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:26:32, skipping insertion in model container [2022-11-16 19:26:32,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:26:32" (3/3) ... [2022-11-16 19:26:32,802 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2022-11-16 19:26:32,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:26:32,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:26:33,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:26:33,207 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;@5071d75e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:26:33,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:26:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 9209 states, 9207 states have (on average 1.9996741609644835) internal successors, (18411), 9208 states have internal predecessors, (18411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 19:26:33,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:33,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:33,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:26:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 182211473, now seen corresponding path program 1 times [2022-11-16 19:26:33,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:33,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604994923] [2022-11-16 19:26:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:33,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:33,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:33,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604994923] [2022-11-16 19:26:33,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604994923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:33,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:33,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:26:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350863967] [2022-11-16 19:26:33,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:33,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 19:26:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:33,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 19:26:33,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:26:33,655 INFO L87 Difference]: Start difference. First operand has 9209 states, 9207 states have (on average 1.9996741609644835) internal successors, (18411), 9208 states have internal predecessors, (18411), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:33,959 INFO L93 Difference]: Finished difference Result 17695 states and 35377 transitions. [2022-11-16 19:26:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 19:26:33,962 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 19:26:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:34,024 INFO L225 Difference]: With dead ends: 17695 [2022-11-16 19:26:34,025 INFO L226 Difference]: Without dead ends: 8279 [2022-11-16 19:26:34,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:26:34,050 INFO L413 NwaCegarLoop]: 14143 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14143 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:34,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14143 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:26:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2022-11-16 19:26:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 8279. [2022-11-16 19:26:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8279 states, 8278 states have (on average 1.5699444310219859) internal successors, (12996), 8278 states have internal predecessors, (12996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8279 states to 8279 states and 12996 transitions. [2022-11-16 19:26:34,360 INFO L78 Accepts]: Start accepts. Automaton has 8279 states and 12996 transitions. Word has length 8 [2022-11-16 19:26:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:34,361 INFO L495 AbstractCegarLoop]: Abstraction has 8279 states and 12996 transitions. [2022-11-16 19:26:34,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 8279 states and 12996 transitions. [2022-11-16 19:26:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:26:34,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:34,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:34,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:26:34,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:26:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1884649833, now seen corresponding path program 1 times [2022-11-16 19:26:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:34,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119165290] [2022-11-16 19:26:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:34,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:34,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:34,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119165290] [2022-11-16 19:26:34,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119165290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:34,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:34,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:26:34,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332221108] [2022-11-16 19:26:34,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:34,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:34,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:34,596 INFO L87 Difference]: Start difference. First operand 8279 states and 12996 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:37,336 INFO L93 Difference]: Finished difference Result 16560 states and 25995 transitions. [2022-11-16 19:26:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:26:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:37,363 INFO L225 Difference]: With dead ends: 16560 [2022-11-16 19:26:37,363 INFO L226 Difference]: Without dead ends: 8282 [2022-11-16 19:26:37,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:37,376 INFO L413 NwaCegarLoop]: 12994 mSDtfsCounter, 4 mSDsluCounter, 11519 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24513 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:37,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 24513 Invalid, 1475 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 19:26:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8282 states. [2022-11-16 19:26:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8282 to 8282. [2022-11-16 19:26:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8281 states have (on average 1.569737954353339) internal successors, (12999), 8281 states have internal predecessors, (12999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 12999 transitions. [2022-11-16 19:26:37,566 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 12999 transitions. Word has length 9 [2022-11-16 19:26:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:37,567 INFO L495 AbstractCegarLoop]: Abstraction has 8282 states and 12999 transitions. [2022-11-16 19:26:37,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 12999 transitions. [2022-11-16 19:26:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:26:37,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:37,571 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:37,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:26:37,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:26:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash 897026676, now seen corresponding path program 1 times [2022-11-16 19:26:37,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:37,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780694786] [2022-11-16 19:26:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:37,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:37,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780694786] [2022-11-16 19:26:37,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780694786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:37,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:37,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:26:37,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262462347] [2022-11-16 19:26:37,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:37,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:37,773 INFO L87 Difference]: Start difference. First operand 8282 states and 12999 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:40,163 INFO L93 Difference]: Finished difference Result 16568 states and 26004 transitions. [2022-11-16 19:26:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:40,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:26:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:40,196 INFO L225 Difference]: With dead ends: 16568 [2022-11-16 19:26:40,196 INFO L226 Difference]: Without dead ends: 8288 [2022-11-16 19:26:40,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:40,206 INFO L413 NwaCegarLoop]: 12993 mSDtfsCounter, 329 mSDsluCounter, 11196 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 24189 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:40,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 24189 Invalid, 1479 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 19:26:40,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2022-11-16 19:26:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 8286. [2022-11-16 19:26:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8286 states, 8285 states have (on average 1.5694628847314425) internal successors, (13003), 8285 states have internal predecessors, (13003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8286 states to 8286 states and 13003 transitions. [2022-11-16 19:26:40,384 INFO L78 Accepts]: Start accepts. Automaton has 8286 states and 13003 transitions. Word has length 14 [2022-11-16 19:26:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:40,384 INFO L495 AbstractCegarLoop]: Abstraction has 8286 states and 13003 transitions. [2022-11-16 19:26:40,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 8286 states and 13003 transitions. [2022-11-16 19:26:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:40,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:40,386 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:40,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:26:40,386 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:26:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1409738145, now seen corresponding path program 1 times [2022-11-16 19:26:40,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:40,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979782949] [2022-11-16 19:26:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:40,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979782949] [2022-11-16 19:26:40,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979782949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:40,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:40,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:26:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170708521] [2022-11-16 19:26:40,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:40,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:40,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:40,484 INFO L87 Difference]: Start difference. First operand 8286 states and 13003 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:44,843 INFO L93 Difference]: Finished difference Result 16490 states and 25884 transitions. [2022-11-16 19:26:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2022-11-16 19:26:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:44,870 INFO L225 Difference]: With dead ends: 16490 [2022-11-16 19:26:44,870 INFO L226 Difference]: Without dead ends: 8164 [2022-11-16 19:26:44,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:44,882 INFO L413 NwaCegarLoop]: 9996 mSDtfsCounter, 11116 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 1749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11116 SdHoareTripleChecker+Valid, 9996 SdHoareTripleChecker+Invalid, 4168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1749 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:44,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11116 Valid, 9996 Invalid, 4168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1749 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-16 19:26:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8164 states. [2022-11-16 19:26:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8164 to 8164. [2022-11-16 19:26:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8164 states, 8163 states have (on average 1.516599289476908) internal successors, (12380), 8163 states have internal predecessors, (12380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8164 states to 8164 states and 12380 transitions. [2022-11-16 19:26:45,091 INFO L78 Accepts]: Start accepts. Automaton has 8164 states and 12380 transitions. Word has length 18 [2022-11-16 19:26:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:45,093 INFO L495 AbstractCegarLoop]: Abstraction has 8164 states and 12380 transitions. [2022-11-16 19:26:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 8164 states and 12380 transitions. [2022-11-16 19:26:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 19:26:45,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:45,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:45,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:26:45,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:26:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1096116993, now seen corresponding path program 1 times [2022-11-16 19:26:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967030160] [2022-11-16 19:26:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:45,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:45,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967030160] [2022-11-16 19:26:45,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967030160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:45,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:45,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:26:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233815662] [2022-11-16 19:26:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:45,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:45,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:45,274 INFO L87 Difference]: Start difference. First operand 8164 states and 12380 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:49,568 INFO L93 Difference]: Finished difference Result 24488 states and 37136 transitions. [2022-11-16 19:26:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2022-11-16 19:26:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:49,613 INFO L225 Difference]: With dead ends: 24488 [2022-11-16 19:26:49,613 INFO L226 Difference]: Without dead ends: 16276 [2022-11-16 19:26:49,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:49,623 INFO L413 NwaCegarLoop]: 10922 mSDtfsCounter, 11045 mSDsluCounter, 10880 mSDsCounter, 0 mSdLazyCounter, 2812 mSolverCounterSat, 1427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11045 SdHoareTripleChecker+Valid, 21802 SdHoareTripleChecker+Invalid, 4239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1427 IncrementalHoareTripleChecker+Valid, 2812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:49,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11045 Valid, 21802 Invalid, 4239 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1427 Valid, 2812 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-16 19:26:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16276 states. [2022-11-16 19:26:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16276 to 14962. [2022-11-16 19:26:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14962 states, 14961 states have (on average 1.5566472829356326) internal successors, (23289), 14961 states have internal predecessors, (23289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 23289 transitions. [2022-11-16 19:26:49,906 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 23289 transitions. Word has length 22 [2022-11-16 19:26:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:49,906 INFO L495 AbstractCegarLoop]: Abstraction has 14962 states and 23289 transitions. [2022-11-16 19:26:49,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 23289 transitions. [2022-11-16 19:26:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 19:26:49,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:49,910 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:49,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:26:49,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:26:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1423449426, now seen corresponding path program 1 times [2022-11-16 19:26:49,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:49,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890757858] [2022-11-16 19:26:49,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:49,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:50,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:50,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890757858] [2022-11-16 19:26:50,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890757858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:50,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:50,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:26:50,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833243199] [2022-11-16 19:26:50,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:50,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:50,134 INFO L87 Difference]: Start difference. First operand 14962 states and 23289 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:56,357 INFO L93 Difference]: Finished difference Result 37762 states and 58559 transitions. [2022-11-16 19:26:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2022-11-16 19:26:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:56,409 INFO L225 Difference]: With dead ends: 37762 [2022-11-16 19:26:56,409 INFO L226 Difference]: Without dead ends: 22520 [2022-11-16 19:26:56,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:56,425 INFO L413 NwaCegarLoop]: 10500 mSDtfsCounter, 10474 mSDsluCounter, 9628 mSDsCounter, 0 mSdLazyCounter, 4456 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10474 SdHoareTripleChecker+Valid, 20128 SdHoareTripleChecker+Invalid, 5943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 4456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:56,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10474 Valid, 20128 Invalid, 5943 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1487 Valid, 4456 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-16 19:26:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22520 states. [2022-11-16 19:26:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22520 to 21280. [2022-11-16 19:26:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21280 states, 21279 states have (on average 1.5519056346632831) internal successors, (33023), 21279 states have internal predecessors, (33023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21280 states to 21280 states and 33023 transitions. [2022-11-16 19:26:56,792 INFO L78 Accepts]: Start accepts. Automaton has 21280 states and 33023 transitions. Word has length 24 [2022-11-16 19:26:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:56,792 INFO L495 AbstractCegarLoop]: Abstraction has 21280 states and 33023 transitions. [2022-11-16 19:26:56,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 21280 states and 33023 transitions. [2022-11-16 19:26:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 19:26:56,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:56,798 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:26:56,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 19:26:56,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:26:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1092028023, now seen corresponding path program 1 times [2022-11-16 19:26:56,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2527432] [2022-11-16 19:26:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:56,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:56,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:56,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2527432] [2022-11-16 19:26:56,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2527432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:56,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:56,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:26:56,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140374585] [2022-11-16 19:26:56,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:56,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:56,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:56,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:56,962 INFO L87 Difference]: Start difference. First operand 21280 states and 33023 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:04,121 INFO L93 Difference]: Finished difference Result 63806 states and 99005 transitions. [2022-11-16 19:27:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:04,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2022-11-16 19:27:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:04,220 INFO L225 Difference]: With dead ends: 63806 [2022-11-16 19:27:04,220 INFO L226 Difference]: Without dead ends: 42528 [2022-11-16 19:27:04,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:04,243 INFO L413 NwaCegarLoop]: 21588 mSDtfsCounter, 11013 mSDsluCounter, 9572 mSDsCounter, 0 mSdLazyCounter, 5598 mSolverCounterSat, 1148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11013 SdHoareTripleChecker+Valid, 31160 SdHoareTripleChecker+Invalid, 6746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1148 IncrementalHoareTripleChecker+Valid, 5598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:04,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11013 Valid, 31160 Invalid, 6746 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1148 Valid, 5598 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-16 19:27:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42528 states. [2022-11-16 19:27:04,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42528 to 40444. [2022-11-16 19:27:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40444 states, 40443 states have (on average 1.5746606334841629) internal successors, (63684), 40443 states have internal predecessors, (63684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40444 states to 40444 states and 63684 transitions. [2022-11-16 19:27:05,161 INFO L78 Accepts]: Start accepts. Automaton has 40444 states and 63684 transitions. Word has length 29 [2022-11-16 19:27:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:05,162 INFO L495 AbstractCegarLoop]: Abstraction has 40444 states and 63684 transitions. [2022-11-16 19:27:05,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 40444 states and 63684 transitions. [2022-11-16 19:27:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 19:27:05,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:05,165 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 19:27:05,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 19:27:05,165 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash -197265190, now seen corresponding path program 1 times [2022-11-16 19:27:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:05,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786692108] [2022-11-16 19:27:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:05,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:27:05,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786692108] [2022-11-16 19:27:05,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786692108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:05,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:05,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:05,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919431287] [2022-11-16 19:27:05,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:05,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:05,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:05,309 INFO L87 Difference]: Start difference. First operand 40444 states and 63684 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:07,409 INFO L93 Difference]: Finished difference Result 80918 states and 127421 transitions. [2022-11-16 19:27:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 35 [2022-11-16 19:27:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:07,493 INFO L225 Difference]: With dead ends: 80918 [2022-11-16 19:27:07,494 INFO L226 Difference]: Without dead ends: 40476 [2022-11-16 19:27:07,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:07,523 INFO L413 NwaCegarLoop]: 12340 mSDtfsCounter, 305 mSDsluCounter, 10698 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 23038 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:07,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 23038 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 19:27:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40476 states. [2022-11-16 19:27:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40476 to 40474. [2022-11-16 19:27:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40474 states, 40473 states have (on average 1.5742346749684974) internal successors, (63714), 40473 states have internal predecessors, (63714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40474 states to 40474 states and 63714 transitions. [2022-11-16 19:27:08,421 INFO L78 Accepts]: Start accepts. Automaton has 40474 states and 63714 transitions. Word has length 35 [2022-11-16 19:27:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:08,422 INFO L495 AbstractCegarLoop]: Abstraction has 40474 states and 63714 transitions. [2022-11-16 19:27:08,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 40474 states and 63714 transitions. [2022-11-16 19:27:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 19:27:08,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:08,426 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 19:27:08,427 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -504887773, now seen corresponding path program 1 times [2022-11-16 19:27:08,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:08,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91265328] [2022-11-16 19:27:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:08,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:08,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91265328] [2022-11-16 19:27:08,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91265328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:08,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:08,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354904718] [2022-11-16 19:27:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:08,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:08,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:08,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:08,535 INFO L87 Difference]: Start difference. First operand 40474 states and 63714 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:13,098 INFO L93 Difference]: Finished difference Result 109022 states and 171832 transitions. [2022-11-16 19:27:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2022-11-16 19:27:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:13,194 INFO L225 Difference]: With dead ends: 109022 [2022-11-16 19:27:13,194 INFO L226 Difference]: Without dead ends: 68500 [2022-11-16 19:27:13,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:13,220 INFO L413 NwaCegarLoop]: 10922 mSDtfsCounter, 11029 mSDsluCounter, 10880 mSDsCounter, 0 mSdLazyCounter, 2748 mSolverCounterSat, 1395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11029 SdHoareTripleChecker+Valid, 21802 SdHoareTripleChecker+Invalid, 4143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1395 IncrementalHoareTripleChecker+Valid, 2748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:13,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11029 Valid, 21802 Invalid, 4143 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1395 Valid, 2748 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-16 19:27:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68500 states. [2022-11-16 19:27:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68500 to 66770. [2022-11-16 19:27:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66770 states, 66769 states have (on average 1.585136814988992) internal successors, (105838), 66769 states have internal predecessors, (105838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66770 states to 66770 states and 105838 transitions. [2022-11-16 19:27:14,504 INFO L78 Accepts]: Start accepts. Automaton has 66770 states and 105838 transitions. Word has length 38 [2022-11-16 19:27:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:14,504 INFO L495 AbstractCegarLoop]: Abstraction has 66770 states and 105838 transitions. [2022-11-16 19:27:14,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 66770 states and 105838 transitions. [2022-11-16 19:27:14,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 19:27:14,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:14,506 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:14,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 19:27:14,506 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:14,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2095911498, now seen corresponding path program 1 times [2022-11-16 19:27:14,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:14,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967440203] [2022-11-16 19:27:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:27:14,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:14,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967440203] [2022-11-16 19:27:14,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967440203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:14,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:14,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:14,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062526745] [2022-11-16 19:27:14,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:14,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:14,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:14,722 INFO L87 Difference]: Start difference. First operand 66770 states and 105838 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:17,174 INFO L93 Difference]: Finished difference Result 129326 states and 204979 transitions. [2022-11-16 19:27:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:17,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 45 [2022-11-16 19:27:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:17,264 INFO L225 Difference]: With dead ends: 129326 [2022-11-16 19:27:17,264 INFO L226 Difference]: Without dead ends: 62558 [2022-11-16 19:27:17,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:17,312 INFO L413 NwaCegarLoop]: 12045 mSDtfsCounter, 10323 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10323 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1190 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:17,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10323 Valid, 12595 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1190 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 19:27:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62558 states. [2022-11-16 19:27:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62558 to 62556. [2022-11-16 19:27:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62556 states, 62555 states have (on average 1.584237870673807) internal successors, (99102), 62555 states have internal predecessors, (99102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62556 states to 62556 states and 99102 transitions. [2022-11-16 19:27:18,741 INFO L78 Accepts]: Start accepts. Automaton has 62556 states and 99102 transitions. Word has length 45 [2022-11-16 19:27:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:18,741 INFO L495 AbstractCegarLoop]: Abstraction has 62556 states and 99102 transitions. [2022-11-16 19:27:18,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 62556 states and 99102 transitions. [2022-11-16 19:27:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 19:27:18,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:18,744 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:18,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 19:27:18,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1850197707, now seen corresponding path program 1 times [2022-11-16 19:27:18,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:18,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770033768] [2022-11-16 19:27:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:18,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:19,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:19,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770033768] [2022-11-16 19:27:19,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770033768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:19,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:19,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:27:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917376172] [2022-11-16 19:27:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:19,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:27:19,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:27:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:27:19,046 INFO L87 Difference]: Start difference. First operand 62556 states and 99102 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:25,975 INFO L93 Difference]: Finished difference Result 119611 states and 189345 transitions. [2022-11-16 19:27:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:27:25,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2022-11-16 19:27:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:26,062 INFO L225 Difference]: With dead ends: 119611 [2022-11-16 19:27:26,062 INFO L226 Difference]: Without dead ends: 62790 [2022-11-16 19:27:26,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:27:26,092 INFO L413 NwaCegarLoop]: 9460 mSDtfsCounter, 20538 mSDsluCounter, 9229 mSDsCounter, 0 mSdLazyCounter, 4112 mSolverCounterSat, 2449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20538 SdHoareTripleChecker+Valid, 18689 SdHoareTripleChecker+Invalid, 6561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2449 IncrementalHoareTripleChecker+Valid, 4112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:26,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20538 Valid, 18689 Invalid, 6561 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2449 Valid, 4112 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-16 19:27:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62790 states. [2022-11-16 19:27:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62790 to 60394. [2022-11-16 19:27:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60394 states, 60393 states have (on average 1.56274733826768) internal successors, (94379), 60393 states have internal predecessors, (94379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60394 states to 60394 states and 94379 transitions. [2022-11-16 19:27:26,983 INFO L78 Accepts]: Start accepts. Automaton has 60394 states and 94379 transitions. Word has length 51 [2022-11-16 19:27:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:26,983 INFO L495 AbstractCegarLoop]: Abstraction has 60394 states and 94379 transitions. [2022-11-16 19:27:26,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 60394 states and 94379 transitions. [2022-11-16 19:27:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 19:27:26,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:26,984 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:26,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 19:27:26,985 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:26,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1545744311, now seen corresponding path program 1 times [2022-11-16 19:27:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:26,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889875095] [2022-11-16 19:27:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:26,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:27:27,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:27,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889875095] [2022-11-16 19:27:27,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889875095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:27,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:27,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:27,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470567959] [2022-11-16 19:27:27,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:27,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:27,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:27,089 INFO L87 Difference]: Start difference. First operand 60394 states and 94379 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:29,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:29,060 INFO L93 Difference]: Finished difference Result 120431 states and 188192 transitions. [2022-11-16 19:27:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:29,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 52 [2022-11-16 19:27:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:29,137 INFO L225 Difference]: With dead ends: 120431 [2022-11-16 19:27:29,137 INFO L226 Difference]: Without dead ends: 60456 [2022-11-16 19:27:29,163 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 [2022-11-16 19:27:29,164 INFO L413 NwaCegarLoop]: 11635 mSDtfsCounter, 277 mSDsluCounter, 10273 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 21908 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:29,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 21908 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 19:27:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60456 states. [2022-11-16 19:27:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60456 to 60454. [2022-11-16 19:27:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60454 states, 60453 states have (on average 1.5621888078341852) internal successors, (94439), 60453 states have internal predecessors, (94439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60454 states to 60454 states and 94439 transitions. [2022-11-16 19:27:30,037 INFO L78 Accepts]: Start accepts. Automaton has 60454 states and 94439 transitions. Word has length 52 [2022-11-16 19:27:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:30,037 INFO L495 AbstractCegarLoop]: Abstraction has 60454 states and 94439 transitions. [2022-11-16 19:27:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 60454 states and 94439 transitions. [2022-11-16 19:27:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 19:27:30,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:30,038 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:30,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 19:27:30,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash -645596173, now seen corresponding path program 1 times [2022-11-16 19:27:30,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:30,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505596098] [2022-11-16 19:27:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:30,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:27:30,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:30,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505596098] [2022-11-16 19:27:30,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505596098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:30,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:30,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760248763] [2022-11-16 19:27:30,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:30,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:30,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:30,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:30,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:30,152 INFO L87 Difference]: Start difference. First operand 60454 states and 94439 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:34,832 INFO L93 Difference]: Finished difference Result 110046 states and 171349 transitions. [2022-11-16 19:27:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:34,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 57 [2022-11-16 19:27:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:34,923 INFO L225 Difference]: With dead ends: 110046 [2022-11-16 19:27:34,924 INFO L226 Difference]: Without dead ends: 61420 [2022-11-16 19:27:34,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:34,954 INFO L413 NwaCegarLoop]: 10157 mSDtfsCounter, 9944 mSDsluCounter, 9401 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9944 SdHoareTripleChecker+Valid, 19558 SdHoareTripleChecker+Invalid, 3876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:34,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9944 Valid, 19558 Invalid, 3876 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1080 Valid, 2796 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-16 19:27:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61420 states. [2022-11-16 19:27:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61420 to 60198. [2022-11-16 19:27:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60198 states, 60197 states have (on average 1.551821519344818) internal successors, (93415), 60197 states have internal predecessors, (93415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60198 states to 60198 states and 93415 transitions. [2022-11-16 19:27:35,848 INFO L78 Accepts]: Start accepts. Automaton has 60198 states and 93415 transitions. Word has length 57 [2022-11-16 19:27:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:35,849 INFO L495 AbstractCegarLoop]: Abstraction has 60198 states and 93415 transitions. [2022-11-16 19:27:35,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 60198 states and 93415 transitions. [2022-11-16 19:27:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 19:27:35,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:35,850 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:27:35,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 19:27:35,850 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2088051592, now seen corresponding path program 1 times [2022-11-16 19:27:35,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:35,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619682753] [2022-11-16 19:27:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:35,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:36,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:36,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619682753] [2022-11-16 19:27:36,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619682753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:36,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:36,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:36,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803299540] [2022-11-16 19:27:36,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:36,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:36,361 INFO L87 Difference]: Start difference. First operand 60198 states and 93415 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:41,456 INFO L93 Difference]: Finished difference Result 122229 states and 188540 transitions. [2022-11-16 19:27:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-11-16 19:27:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:41,530 INFO L225 Difference]: With dead ends: 122229 [2022-11-16 19:27:41,531 INFO L226 Difference]: Without dead ends: 62410 [2022-11-16 19:27:41,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:41,556 INFO L413 NwaCegarLoop]: 10083 mSDtfsCounter, 10224 mSDsluCounter, 9165 mSDsCounter, 0 mSdLazyCounter, 3871 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10224 SdHoareTripleChecker+Valid, 19248 SdHoareTripleChecker+Invalid, 4717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 3871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:41,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10224 Valid, 19248 Invalid, 4717 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [846 Valid, 3871 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-16 19:27:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62410 states. [2022-11-16 19:27:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62410 to 59892. [2022-11-16 19:27:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59892 states, 59891 states have (on average 1.548279374196457) internal successors, (92728), 59891 states have internal predecessors, (92728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59892 states to 59892 states and 92728 transitions. [2022-11-16 19:27:42,467 INFO L78 Accepts]: Start accepts. Automaton has 59892 states and 92728 transitions. Word has length 63 [2022-11-16 19:27:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:42,468 INFO L495 AbstractCegarLoop]: Abstraction has 59892 states and 92728 transitions. [2022-11-16 19:27:42,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 59892 states and 92728 transitions. [2022-11-16 19:27:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 19:27:42,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:42,469 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:27:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 19:27:42,470 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1015894375, now seen corresponding path program 1 times [2022-11-16 19:27:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:42,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884873598] [2022-11-16 19:27:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:42,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:42,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:42,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884873598] [2022-11-16 19:27:42,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884873598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:42,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:42,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:42,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232427068] [2022-11-16 19:27:42,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:42,837 INFO L87 Difference]: Start difference. First operand 59892 states and 92728 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:49,412 INFO L93 Difference]: Finished difference Result 97933 states and 150395 transitions. [2022-11-16 19:27:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2022-11-16 19:27:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:49,503 INFO L225 Difference]: With dead ends: 97933 [2022-11-16 19:27:49,503 INFO L226 Difference]: Without dead ends: 72925 [2022-11-16 19:27:49,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:49,522 INFO L413 NwaCegarLoop]: 19378 mSDtfsCounter, 9838 mSDsluCounter, 8887 mSDsCounter, 0 mSdLazyCounter, 5059 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9838 SdHoareTripleChecker+Valid, 28265 SdHoareTripleChecker+Invalid, 5697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 5059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:49,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9838 Valid, 28265 Invalid, 5697 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [638 Valid, 5059 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-16 19:27:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72925 states. [2022-11-16 19:27:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72925 to 71075. [2022-11-16 19:27:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71075 states, 71074 states have (on average 1.5502574781213947) internal successors, (110183), 71074 states have internal predecessors, (110183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71075 states to 71075 states and 110183 transitions. [2022-11-16 19:27:50,471 INFO L78 Accepts]: Start accepts. Automaton has 71075 states and 110183 transitions. Word has length 73 [2022-11-16 19:27:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:50,472 INFO L495 AbstractCegarLoop]: Abstraction has 71075 states and 110183 transitions. [2022-11-16 19:27:50,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71075 states and 110183 transitions. [2022-11-16 19:27:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 19:27:50,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:50,474 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:50,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 19:27:50,474 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1346282361, now seen corresponding path program 1 times [2022-11-16 19:27:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:50,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226224583] [2022-11-16 19:27:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:50,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:27:50,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:50,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226224583] [2022-11-16 19:27:50,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226224583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:50,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:50,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548766669] [2022-11-16 19:27:50,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:50,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:50,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:50,964 INFO L87 Difference]: Start difference. First operand 71075 states and 110183 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:52,605 INFO L93 Difference]: Finished difference Result 138716 states and 215048 transitions. [2022-11-16 19:27:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:52,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-16 19:27:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:52,694 INFO L225 Difference]: With dead ends: 138716 [2022-11-16 19:27:52,694 INFO L226 Difference]: Without dead ends: 68432 [2022-11-16 19:27:52,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:52,727 INFO L413 NwaCegarLoop]: 11218 mSDtfsCounter, 9552 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9552 SdHoareTripleChecker+Valid, 12026 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:52,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9552 Valid, 12026 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 19:27:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68432 states. [2022-11-16 19:27:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68432 to 68430. [2022-11-16 19:27:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68430 states, 68429 states have (on average 1.5493431147612855) internal successors, (106020), 68429 states have internal predecessors, (106020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68430 states to 68430 states and 106020 transitions. [2022-11-16 19:27:53,905 INFO L78 Accepts]: Start accepts. Automaton has 68430 states and 106020 transitions. Word has length 80 [2022-11-16 19:27:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:53,906 INFO L495 AbstractCegarLoop]: Abstraction has 68430 states and 106020 transitions. [2022-11-16 19:27:53,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 68430 states and 106020 transitions. [2022-11-16 19:27:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 19:27:53,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:53,908 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 19:27:53,908 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:53,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1309827596, now seen corresponding path program 1 times [2022-11-16 19:27:53,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:53,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966547129] [2022-11-16 19:27:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:53,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:27:54,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:54,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966547129] [2022-11-16 19:27:54,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966547129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:54,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:54,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:54,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474772566] [2022-11-16 19:27:54,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:54,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:54,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:54,044 INFO L87 Difference]: Start difference. First operand 68430 states and 106020 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:56,059 INFO L93 Difference]: Finished difference Result 136167 states and 210969 transitions. [2022-11-16 19:27:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:56,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 83 [2022-11-16 19:27:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:56,141 INFO L225 Difference]: With dead ends: 136167 [2022-11-16 19:27:56,141 INFO L226 Difference]: Without dead ends: 68528 [2022-11-16 19:27:56,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:56,172 INFO L413 NwaCegarLoop]: 11289 mSDtfsCounter, 276 mSDsluCounter, 10011 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 21300 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:56,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 21300 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 19:27:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68528 states. [2022-11-16 19:27:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68528 to 68526. [2022-11-16 19:27:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68526 states, 68525 states have (on average 1.5485735133163079) internal successors, (106116), 68525 states have internal predecessors, (106116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68526 states to 68526 states and 106116 transitions. [2022-11-16 19:27:57,122 INFO L78 Accepts]: Start accepts. Automaton has 68526 states and 106116 transitions. Word has length 83 [2022-11-16 19:27:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:57,123 INFO L495 AbstractCegarLoop]: Abstraction has 68526 states and 106116 transitions. [2022-11-16 19:27:57,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 68526 states and 106116 transitions. [2022-11-16 19:27:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 19:27:57,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:57,124 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:57,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 19:27:57,124 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash -557086491, now seen corresponding path program 1 times [2022-11-16 19:27:57,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:57,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176240496] [2022-11-16 19:27:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:57,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:57,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:57,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176240496] [2022-11-16 19:27:57,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176240496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:57,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:57,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:27:57,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072269795] [2022-11-16 19:27:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:57,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:27:57,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:27:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:27:57,469 INFO L87 Difference]: Start difference. First operand 68526 states and 106116 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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)