./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8b0406e617bfcdc7e6543e19b38e9be8eeb37f2896cb91bcfe6035d747328da7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:33:49,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:33:49,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:33:49,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:33:49,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:33:49,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:33:49,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:33:49,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:33:49,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:33:49,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:33:49,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:33:49,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:33:49,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:33:49,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:33:49,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:33:49,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:33:49,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:33:49,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:33:49,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:33:49,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:33:49,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:33:49,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:33:49,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:33:49,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:33:49,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:33:49,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:33:49,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:33:49,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:33:49,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:33:49,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:33:49,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:33:49,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:33:49,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:33:49,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:33:49,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:33:49,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:33:49,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:33:49,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:33:49,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:33:49,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:33:49,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:33:49,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:33:49,231 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:33:49,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:33:49,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:33:49,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:33:49,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:33:49,232 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:33:49,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:33:49,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:33:49,233 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:33:49,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:33:49,233 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:33:49,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:33:49,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:33:49,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:33:49,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:33:49,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:33:49,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:33:49,234 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:33:49,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:33:49,234 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:33:49,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:33:49,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:33:49,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:33:49,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:33:49,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:33:49,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:33:49,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:33:49,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:33:49,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:33:49,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:33:49,236 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:33:49,236 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:33:49,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:33:49,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:33:49,236 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_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b0406e617bfcdc7e6543e19b38e9be8eeb37f2896cb91bcfe6035d747328da7 [2021-12-06 17:33:49,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:33:49,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:33:49,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:33:49,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:33:49,435 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:33:49,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 17:33:49,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/data/a0f55ceca/d1866969679c40b79b615a0b55c9dd4c/FLAG9a9137fdb [2021-12-06 17:33:49,888 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:33:49,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 17:33:49,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/data/a0f55ceca/d1866969679c40b79b615a0b55c9dd4c/FLAG9a9137fdb [2021-12-06 17:33:49,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/data/a0f55ceca/d1866969679c40b79b615a0b55c9dd4c [2021-12-06 17:33:49,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:33:49,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:33:49,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:33:49,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:33:49,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:33:49,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:33:49" (1/1) ... [2021-12-06 17:33:49,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71387193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:49, skipping insertion in model container [2021-12-06 17:33:49,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:33:49" (1/1) ... [2021-12-06 17:33:49,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:33:49,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:33:50,125 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c[11348,11361] [2021-12-06 17:33:50,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:33:50,137 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:33:50,176 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c[11348,11361] [2021-12-06 17:33:50,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:33:50,186 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:33:50,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50 WrapperNode [2021-12-06 17:33:50,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:33:50,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:33:50,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:33:50,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:33:50,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,225 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 429 [2021-12-06 17:33:50,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:33:50,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:33:50,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:33:50,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:33:50,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:33:50,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:33:50,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:33:50,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:33:50,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (1/1) ... [2021-12-06 17:33:50,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:33:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:33:50,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:33:50,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:33:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:33:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:33:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:33:50,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:33:50,391 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:33:50,392 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:33:50,723 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:33:50,730 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:33:50,730 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:33:50,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:33:50 BoogieIcfgContainer [2021-12-06 17:33:50,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:33:50,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:33:50,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:33:50,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:33:50,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:33:49" (1/3) ... [2021-12-06 17:33:50,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192befaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:33:50, skipping insertion in model container [2021-12-06 17:33:50,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:33:50" (2/3) ... [2021-12-06 17:33:50,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192befaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:33:50, skipping insertion in model container [2021-12-06 17:33:50,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:33:50" (3/3) ... [2021-12-06 17:33:50,737 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 17:33:50,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:33:50,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:33:50,775 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:33:50,780 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:33:50,780 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:33:50,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 124 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:33:50,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:50,799 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:50,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 632685314, now seen corresponding path program 1 times [2021-12-06 17:33:50,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:50,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525162855] [2021-12-06 17:33:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:50,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:50,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:50,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525162855] [2021-12-06 17:33:50,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525162855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:50,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:50,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:33:50,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997766489] [2021-12-06 17:33:50,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:50,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:33:50,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:50,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:33:50,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:33:50,984 INFO L87 Difference]: Start difference. First operand has 125 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 124 states have internal predecessors, (215), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:51,005 INFO L93 Difference]: Finished difference Result 200 states and 340 transitions. [2021-12-06 17:33:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:33:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-12-06 17:33:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:51,014 INFO L225 Difference]: With dead ends: 200 [2021-12-06 17:33:51,014 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 17:33:51,016 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:33:51,019 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:51,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 17:33:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-06 17:33:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.7333333333333334) internal successors, (208), 120 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 208 transitions. [2021-12-06 17:33:51,050 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 208 transitions. Word has length 37 [2021-12-06 17:33:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:51,050 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 208 transitions. [2021-12-06 17:33:51,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 208 transitions. [2021-12-06 17:33:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:33:51,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:51,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:51,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:33:51,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash -184963136, now seen corresponding path program 1 times [2021-12-06 17:33:51,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:51,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073746158] [2021-12-06 17:33:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:51,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:51,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073746158] [2021-12-06 17:33:51,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073746158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:51,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:51,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:33:51,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177277034] [2021-12-06 17:33:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:51,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:33:51,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:51,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:33:51,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:51,164 INFO L87 Difference]: Start difference. First operand 121 states and 208 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:51,235 INFO L93 Difference]: Finished difference Result 265 states and 448 transitions. [2021-12-06 17:33:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:33:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2021-12-06 17:33:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:51,237 INFO L225 Difference]: With dead ends: 265 [2021-12-06 17:33:51,237 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 17:33:51,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:33:51,239 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 120 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:51,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 790 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 17:33:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2021-12-06 17:33:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.5583333333333333) internal successors, (187), 120 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 187 transitions. [2021-12-06 17:33:51,249 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 187 transitions. Word has length 37 [2021-12-06 17:33:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:51,249 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 187 transitions. [2021-12-06 17:33:51,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 187 transitions. [2021-12-06 17:33:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 17:33:51,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:51,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:51,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:33:51,252 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1843152740, now seen corresponding path program 1 times [2021-12-06 17:33:51,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:51,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467282895] [2021-12-06 17:33:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:51,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:51,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:51,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467282895] [2021-12-06 17:33:51,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467282895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:51,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:51,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:33:51,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000629847] [2021-12-06 17:33:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:51,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:33:51,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:33:51,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:33:51,339 INFO L87 Difference]: Start difference. First operand 121 states and 187 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:51,370 INFO L93 Difference]: Finished difference Result 252 states and 406 transitions. [2021-12-06 17:33:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:33:51,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 [2021-12-06 17:33:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:51,372 INFO L225 Difference]: With dead ends: 252 [2021-12-06 17:33:51,372 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 17:33:51,373 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:33:51,374 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 93 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:51,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 415 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 17:33:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-12-06 17:33:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.5754189944134078) internal successors, (282), 179 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 282 transitions. [2021-12-06 17:33:51,390 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 282 transitions. Word has length 57 [2021-12-06 17:33:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:51,390 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 282 transitions. [2021-12-06 17:33:51,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 282 transitions. [2021-12-06 17:33:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 17:33:51,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:51,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:51,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:33:51,394 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:51,395 INFO L85 PathProgramCache]: Analyzing trace with hash 700379209, now seen corresponding path program 1 times [2021-12-06 17:33:51,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:51,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641139350] [2021-12-06 17:33:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:51,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:51,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:51,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641139350] [2021-12-06 17:33:51,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641139350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:51,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:51,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:33:51,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506825901] [2021-12-06 17:33:51,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:51,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:33:51,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:51,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:33:51,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:33:51,464 INFO L87 Difference]: Start difference. First operand 180 states and 282 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:51,483 INFO L93 Difference]: Finished difference Result 307 states and 495 transitions. [2021-12-06 17:33:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:33:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-12-06 17:33:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:51,485 INFO L225 Difference]: With dead ends: 307 [2021-12-06 17:33:51,485 INFO L226 Difference]: Without dead ends: 237 [2021-12-06 17:33:51,486 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:33:51,488 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:51,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 429 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-06 17:33:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2021-12-06 17:33:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5982905982905984) internal successors, (374), 234 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 374 transitions. [2021-12-06 17:33:51,505 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 374 transitions. Word has length 59 [2021-12-06 17:33:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:51,505 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 374 transitions. [2021-12-06 17:33:51,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 374 transitions. [2021-12-06 17:33:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 17:33:51,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:51,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:51,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:33:51,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1943315629, now seen corresponding path program 1 times [2021-12-06 17:33:51,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:51,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659814549] [2021-12-06 17:33:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:51,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:51,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:51,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659814549] [2021-12-06 17:33:51,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659814549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:51,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:51,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:33:51,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018795978] [2021-12-06 17:33:51,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:51,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:33:51,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:33:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:33:51,572 INFO L87 Difference]: Start difference. First operand 235 states and 374 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:51,596 INFO L93 Difference]: Finished difference Result 578 states and 941 transitions. [2021-12-06 17:33:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:33:51,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-12-06 17:33:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:51,600 INFO L225 Difference]: With dead ends: 578 [2021-12-06 17:33:51,600 INFO L226 Difference]: Without dead ends: 396 [2021-12-06 17:33:51,602 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:33:51,603 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 95 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:51,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 422 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-06 17:33:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 394. [2021-12-06 17:33:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.61323155216285) internal successors, (634), 393 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 634 transitions. [2021-12-06 17:33:51,626 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 634 transitions. Word has length 59 [2021-12-06 17:33:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:51,626 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 634 transitions. [2021-12-06 17:33:51,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 634 transitions. [2021-12-06 17:33:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:33:51,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:51,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:51,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:33:51,629 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1342077512, now seen corresponding path program 1 times [2021-12-06 17:33:51,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61305650] [2021-12-06 17:33:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:51,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:51,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:51,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61305650] [2021-12-06 17:33:51,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61305650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:51,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:51,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:33:51,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013428222] [2021-12-06 17:33:51,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:51,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:33:51,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:33:51,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:33:51,688 INFO L87 Difference]: Start difference. First operand 394 states and 634 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:51,715 INFO L93 Difference]: Finished difference Result 723 states and 1177 transitions. [2021-12-06 17:33:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:33:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2021-12-06 17:33:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:51,719 INFO L225 Difference]: With dead ends: 723 [2021-12-06 17:33:51,719 INFO L226 Difference]: Without dead ends: 541 [2021-12-06 17:33:51,720 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:33:51,721 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 96 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:51,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 415 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-06 17:33:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2021-12-06 17:33:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.6152416356877324) internal successors, (869), 538 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 869 transitions. [2021-12-06 17:33:51,746 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 869 transitions. Word has length 61 [2021-12-06 17:33:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:51,747 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 869 transitions. [2021-12-06 17:33:51,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 869 transitions. [2021-12-06 17:33:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:33:51,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:51,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:51,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:33:51,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:51,749 INFO L85 PathProgramCache]: Analyzing trace with hash -308214334, now seen corresponding path program 1 times [2021-12-06 17:33:51,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:51,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316302304] [2021-12-06 17:33:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:51,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:51,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:51,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316302304] [2021-12-06 17:33:51,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316302304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:51,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:51,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:33:51,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683552470] [2021-12-06 17:33:51,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:51,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:33:51,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:51,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:33:51,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:33:51,784 INFO L87 Difference]: Start difference. First operand 539 states and 869 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:51,820 INFO L93 Difference]: Finished difference Result 1428 states and 2320 transitions. [2021-12-06 17:33:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:33:51,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2021-12-06 17:33:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:51,827 INFO L225 Difference]: With dead ends: 1428 [2021-12-06 17:33:51,828 INFO L226 Difference]: Without dead ends: 952 [2021-12-06 17:33:51,829 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:33:51,830 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 89 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:51,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 358 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:51,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-06 17:33:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 950. [2021-12-06 17:33:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 1.608008429926238) internal successors, (1526), 949 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1526 transitions. [2021-12-06 17:33:51,870 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1526 transitions. Word has length 61 [2021-12-06 17:33:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:51,870 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1526 transitions. [2021-12-06 17:33:51,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1526 transitions. [2021-12-06 17:33:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:33:51,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:51,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:51,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:33:51,872 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash 349619889, now seen corresponding path program 1 times [2021-12-06 17:33:51,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:51,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270548556] [2021-12-06 17:33:51,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:51,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:51,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:51,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270548556] [2021-12-06 17:33:51,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270548556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:51,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:51,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:33:51,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814487119] [2021-12-06 17:33:51,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:51,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:33:51,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:33:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:51,917 INFO L87 Difference]: Start difference. First operand 950 states and 1526 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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) [2021-12-06 17:33:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:52,064 INFO L93 Difference]: Finished difference Result 4661 states and 7632 transitions. [2021-12-06 17:33:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:33:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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 [2021-12-06 17:33:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:52,086 INFO L225 Difference]: With dead ends: 4661 [2021-12-06 17:33:52,087 INFO L226 Difference]: Without dead ends: 3774 [2021-12-06 17:33:52,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:33:52,089 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 865 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:52,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 906 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:33:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-12-06 17:33:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 1770. [2021-12-06 17:33:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 1.607687959299039) internal successors, (2844), 1769 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2844 transitions. [2021-12-06 17:33:52,157 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2844 transitions. Word has length 63 [2021-12-06 17:33:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:52,158 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 2844 transitions. [2021-12-06 17:33:52,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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) [2021-12-06 17:33:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2844 transitions. [2021-12-06 17:33:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:33:52,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:52,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:52,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:33:52,159 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash 325449286, now seen corresponding path program 1 times [2021-12-06 17:33:52,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:52,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882384961] [2021-12-06 17:33:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:52,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:52,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882384961] [2021-12-06 17:33:52,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882384961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:52,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:52,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:33:52,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695956117] [2021-12-06 17:33:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:52,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:33:52,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:33:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:33:52,198 INFO L87 Difference]: Start difference. First operand 1770 states and 2844 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:52,338 INFO L93 Difference]: Finished difference Result 5679 states and 9231 transitions. [2021-12-06 17:33:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:33:52,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 64 [2021-12-06 17:33:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:52,361 INFO L225 Difference]: With dead ends: 5679 [2021-12-06 17:33:52,361 INFO L226 Difference]: Without dead ends: 3972 [2021-12-06 17:33:52,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:52,365 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 338 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:52,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 603 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-12-06 17:33:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 2858. [2021-12-06 17:33:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 1.6107805390269514) internal successors, (4602), 2857 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4602 transitions. [2021-12-06 17:33:52,462 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4602 transitions. Word has length 64 [2021-12-06 17:33:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:52,462 INFO L470 AbstractCegarLoop]: Abstraction has 2858 states and 4602 transitions. [2021-12-06 17:33:52,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4602 transitions. [2021-12-06 17:33:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:33:52,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:52,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:52,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:33:52,463 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:52,463 INFO L85 PathProgramCache]: Analyzing trace with hash 905685231, now seen corresponding path program 1 times [2021-12-06 17:33:52,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:52,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763465399] [2021-12-06 17:33:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:52,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:52,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:52,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763465399] [2021-12-06 17:33:52,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763465399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:52,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:52,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:33:52,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580979534] [2021-12-06 17:33:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:52,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:33:52,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:33:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:33:52,498 INFO L87 Difference]: Start difference. First operand 2858 states and 4602 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:52,590 INFO L93 Difference]: Finished difference Result 5558 states and 8983 transitions. [2021-12-06 17:33:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:33:52,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-12-06 17:33:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:52,607 INFO L225 Difference]: With dead ends: 5558 [2021-12-06 17:33:52,608 INFO L226 Difference]: Without dead ends: 3988 [2021-12-06 17:33:52,610 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:33:52,610 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 90 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:52,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 407 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2021-12-06 17:33:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3986. [2021-12-06 17:33:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3985 states have (on average 1.6005018820577164) internal successors, (6378), 3985 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 6378 transitions. [2021-12-06 17:33:52,735 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 6378 transitions. Word has length 64 [2021-12-06 17:33:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:52,736 INFO L470 AbstractCegarLoop]: Abstraction has 3986 states and 6378 transitions. [2021-12-06 17:33:52,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 6378 transitions. [2021-12-06 17:33:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:33:52,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:52,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:52,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:33:52,737 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash -254835064, now seen corresponding path program 1 times [2021-12-06 17:33:52,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:52,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766637947] [2021-12-06 17:33:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:52,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:52,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:52,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766637947] [2021-12-06 17:33:52,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766637947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:52,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:52,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:33:52,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030146428] [2021-12-06 17:33:52,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:52,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:33:52,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:33:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:33:52,776 INFO L87 Difference]: Start difference. First operand 3986 states and 6378 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:53,026 INFO L93 Difference]: Finished difference Result 12749 states and 20489 transitions. [2021-12-06 17:33:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:33:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2021-12-06 17:33:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:53,079 INFO L225 Difference]: With dead ends: 12749 [2021-12-06 17:33:53,079 INFO L226 Difference]: Without dead ends: 8836 [2021-12-06 17:33:53,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:53,087 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 336 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:53,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 562 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-12-06 17:33:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6382. [2021-12-06 17:33:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6382 states, 6381 states have (on average 1.5919134931828867) internal successors, (10158), 6381 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 10158 transitions. [2021-12-06 17:33:53,354 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 10158 transitions. Word has length 65 [2021-12-06 17:33:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:53,354 INFO L470 AbstractCegarLoop]: Abstraction has 6382 states and 10158 transitions. [2021-12-06 17:33:53,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 10158 transitions. [2021-12-06 17:33:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:33:53,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:53,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:53,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:33:53,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:53,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash -894776387, now seen corresponding path program 1 times [2021-12-06 17:33:53,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:53,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339292160] [2021-12-06 17:33:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:53,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:53,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:53,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339292160] [2021-12-06 17:33:53,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339292160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:53,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:53,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:33:53,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231223451] [2021-12-06 17:33:53,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:53,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:33:53,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:53,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:33:53,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:33:53,388 INFO L87 Difference]: Start difference. First operand 6382 states and 10158 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:53,747 INFO L93 Difference]: Finished difference Result 20041 states and 32013 transitions. [2021-12-06 17:33:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:33:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2021-12-06 17:33:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:53,779 INFO L225 Difference]: With dead ends: 20041 [2021-12-06 17:33:53,780 INFO L226 Difference]: Without dead ends: 13732 [2021-12-06 17:33:53,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:53,788 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 334 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:53,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 612 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2021-12-06 17:33:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 10014. [2021-12-06 17:33:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10014 states, 10013 states have (on average 1.582942175172276) internal successors, (15850), 10013 states have internal predecessors, (15850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10014 states to 10014 states and 15850 transitions. [2021-12-06 17:33:54,120 INFO L78 Accepts]: Start accepts. Automaton has 10014 states and 15850 transitions. Word has length 66 [2021-12-06 17:33:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:54,120 INFO L470 AbstractCegarLoop]: Abstraction has 10014 states and 15850 transitions. [2021-12-06 17:33:54,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10014 states and 15850 transitions. [2021-12-06 17:33:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:33:54,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:54,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:54,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:33:54,121 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:54,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:54,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1280795893, now seen corresponding path program 1 times [2021-12-06 17:33:54,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:54,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564524202] [2021-12-06 17:33:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:54,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:54,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:54,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564524202] [2021-12-06 17:33:54,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564524202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:54,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:54,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:33:54,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128379164] [2021-12-06 17:33:54,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:54,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:33:54,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:33:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:54,193 INFO L87 Difference]: Start difference. First operand 10014 states and 15850 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:54,454 INFO L93 Difference]: Finished difference Result 19957 states and 31602 transitions. [2021-12-06 17:33:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:33:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 68 [2021-12-06 17:33:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:54,469 INFO L225 Difference]: With dead ends: 19957 [2021-12-06 17:33:54,469 INFO L226 Difference]: Without dead ends: 10016 [2021-12-06 17:33:54,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:33:54,479 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 247 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:54,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 495 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2021-12-06 17:33:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 10014. [2021-12-06 17:33:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10014 states, 10013 states have (on average 1.570458404074703) internal successors, (15725), 10013 states have internal predecessors, (15725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10014 states to 10014 states and 15725 transitions. [2021-12-06 17:33:54,808 INFO L78 Accepts]: Start accepts. Automaton has 10014 states and 15725 transitions. Word has length 68 [2021-12-06 17:33:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:54,809 INFO L470 AbstractCegarLoop]: Abstraction has 10014 states and 15725 transitions. [2021-12-06 17:33:54,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 10014 states and 15725 transitions. [2021-12-06 17:33:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 17:33:54,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:54,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:54,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:33:54,810 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1403896683, now seen corresponding path program 1 times [2021-12-06 17:33:54,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:54,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145231990] [2021-12-06 17:33:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:54,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:54,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:54,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145231990] [2021-12-06 17:33:54,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145231990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:54,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:54,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:33:54,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105131598] [2021-12-06 17:33:54,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:54,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:33:54,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:33:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:54,881 INFO L87 Difference]: Start difference. First operand 10014 states and 15725 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:55,284 INFO L93 Difference]: Finished difference Result 28683 states and 45188 transitions. [2021-12-06 17:33:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:33:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 71 [2021-12-06 17:33:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:55,319 INFO L225 Difference]: With dead ends: 28683 [2021-12-06 17:33:55,319 INFO L226 Difference]: Without dead ends: 18742 [2021-12-06 17:33:55,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:33:55,328 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 157 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:55,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 664 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18742 states. [2021-12-06 17:33:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18742 to 18740. [2021-12-06 17:33:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18740 states, 18739 states have (on average 1.5567532952665564) internal successors, (29172), 18739 states have internal predecessors, (29172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18740 states to 18740 states and 29172 transitions. [2021-12-06 17:33:55,776 INFO L78 Accepts]: Start accepts. Automaton has 18740 states and 29172 transitions. Word has length 71 [2021-12-06 17:33:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:55,776 INFO L470 AbstractCegarLoop]: Abstraction has 18740 states and 29172 transitions. [2021-12-06 17:33:55,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18740 states and 29172 transitions. [2021-12-06 17:33:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:33:55,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:55,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:55,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:33:55,777 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:55,778 INFO L85 PathProgramCache]: Analyzing trace with hash 142548510, now seen corresponding path program 1 times [2021-12-06 17:33:55,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:55,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578968322] [2021-12-06 17:33:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:55,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:33:55,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578968322] [2021-12-06 17:33:55,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578968322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:55,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:55,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:33:55,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957707405] [2021-12-06 17:33:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:55,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:33:55,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:33:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:55,837 INFO L87 Difference]: Start difference. First operand 18740 states and 29172 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:56,597 INFO L93 Difference]: Finished difference Result 36832 states and 56655 transitions. [2021-12-06 17:33:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:33:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 72 [2021-12-06 17:33:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:56,648 INFO L225 Difference]: With dead ends: 36832 [2021-12-06 17:33:56,648 INFO L226 Difference]: Without dead ends: 36830 [2021-12-06 17:33:56,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:33:56,655 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 296 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:56,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 803 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36830 states. [2021-12-06 17:33:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36830 to 19826. [2021-12-06 17:33:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19826 states, 19825 states have (on average 1.5258007566204288) internal successors, (30249), 19825 states have internal predecessors, (30249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19826 states to 19826 states and 30249 transitions. [2021-12-06 17:33:57,286 INFO L78 Accepts]: Start accepts. Automaton has 19826 states and 30249 transitions. Word has length 72 [2021-12-06 17:33:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:57,286 INFO L470 AbstractCegarLoop]: Abstraction has 19826 states and 30249 transitions. [2021-12-06 17:33:57,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 19826 states and 30249 transitions. [2021-12-06 17:33:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:33:57,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:57,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:57,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:33:57,289 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash -561021637, now seen corresponding path program 1 times [2021-12-06 17:33:57,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:57,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547740875] [2021-12-06 17:33:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:57,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:33:57,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:57,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547740875] [2021-12-06 17:33:57,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547740875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:57,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:57,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:33:57,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954274991] [2021-12-06 17:33:57,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:57,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:33:57,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:33:57,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:57,340 INFO L87 Difference]: Start difference. First operand 19826 states and 30249 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:58,290 INFO L93 Difference]: Finished difference Result 48524 states and 74305 transitions. [2021-12-06 17:33:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:33:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 97 [2021-12-06 17:33:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:58,330 INFO L225 Difference]: With dead ends: 48524 [2021-12-06 17:33:58,330 INFO L226 Difference]: Without dead ends: 39122 [2021-12-06 17:33:58,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:33:58,343 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 422 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:58,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 751 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:33:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39122 states. [2021-12-06 17:33:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39122 to 30494. [2021-12-06 17:33:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30494 states, 30493 states have (on average 1.5242514675499295) internal successors, (46479), 30493 states have internal predecessors, (46479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30494 states to 30494 states and 46479 transitions. [2021-12-06 17:33:59,198 INFO L78 Accepts]: Start accepts. Automaton has 30494 states and 46479 transitions. Word has length 97 [2021-12-06 17:33:59,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:59,198 INFO L470 AbstractCegarLoop]: Abstraction has 30494 states and 46479 transitions. [2021-12-06 17:33:59,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:33:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 30494 states and 46479 transitions. [2021-12-06 17:33:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:33:59,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:59,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:59,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:33:59,201 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:59,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1328546247, now seen corresponding path program 1 times [2021-12-06 17:33:59,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:59,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208881567] [2021-12-06 17:33:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:59,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:33:59,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208881567] [2021-12-06 17:33:59,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208881567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:33:59,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:33:59,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:33:59,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029618411] [2021-12-06 17:33:59,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:33:59,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:33:59,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:33:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:33:59,244 INFO L87 Difference]: Start difference. First operand 30494 states and 46479 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:00,160 INFO L93 Difference]: Finished difference Result 52292 states and 80089 transitions. [2021-12-06 17:34:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 97 [2021-12-06 17:34:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:00,207 INFO L225 Difference]: With dead ends: 52292 [2021-12-06 17:34:00,208 INFO L226 Difference]: Without dead ends: 42890 [2021-12-06 17:34:00,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:34:00,224 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 415 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:00,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 811 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42890 states. [2021-12-06 17:34:01,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42890 to 41332. [2021-12-06 17:34:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41332 states, 41331 states have (on average 1.5250296387699305) internal successors, (63031), 41331 states have internal predecessors, (63031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41332 states to 41332 states and 63031 transitions. [2021-12-06 17:34:01,665 INFO L78 Accepts]: Start accepts. Automaton has 41332 states and 63031 transitions. Word has length 97 [2021-12-06 17:34:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:01,666 INFO L470 AbstractCegarLoop]: Abstraction has 41332 states and 63031 transitions. [2021-12-06 17:34:01,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 41332 states and 63031 transitions. [2021-12-06 17:34:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:34:01,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:01,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:01,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:34:01,668 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash 425698093, now seen corresponding path program 1 times [2021-12-06 17:34:01,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:01,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73368284] [2021-12-06 17:34:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:01,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:34:01,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73368284] [2021-12-06 17:34:01,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73368284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:01,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:01,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:34:01,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107898107] [2021-12-06 17:34:01,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:01,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:34:01,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:34:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:01,717 INFO L87 Difference]: Start difference. First operand 41332 states and 63031 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:02,921 INFO L93 Difference]: Finished difference Result 58744 states and 90139 transitions. [2021-12-06 17:34:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:02,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-06 17:34:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:02,977 INFO L225 Difference]: With dead ends: 58744 [2021-12-06 17:34:02,977 INFO L226 Difference]: Without dead ends: 49082 [2021-12-06 17:34:02,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:34:02,994 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 418 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:02,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 864 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49082 states. [2021-12-06 17:34:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49082 to 47524. [2021-12-06 17:34:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47524 states, 47523 states have (on average 1.5279128001178377) internal successors, (72611), 47523 states have internal predecessors, (72611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47524 states to 47524 states and 72611 transitions. [2021-12-06 17:34:04,309 INFO L78 Accepts]: Start accepts. Automaton has 47524 states and 72611 transitions. Word has length 97 [2021-12-06 17:34:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:04,309 INFO L470 AbstractCegarLoop]: Abstraction has 47524 states and 72611 transitions. [2021-12-06 17:34:04,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47524 states and 72611 transitions. [2021-12-06 17:34:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 17:34:04,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:04,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:04,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:34:04,311 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash 422142567, now seen corresponding path program 1 times [2021-12-06 17:34:04,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727232395] [2021-12-06 17:34:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:04,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:34:04,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727232395] [2021-12-06 17:34:04,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727232395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:04,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:04,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:34:04,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446593878] [2021-12-06 17:34:04,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:04,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:34:04,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:04,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:34:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:34:04,571 INFO L87 Difference]: Start difference. First operand 47524 states and 72611 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:08,310 INFO L93 Difference]: Finished difference Result 143925 states and 220205 transitions. [2021-12-06 17:34:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:34:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-06 17:34:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:08,476 INFO L225 Difference]: With dead ends: 143925 [2021-12-06 17:34:08,476 INFO L226 Difference]: Without dead ends: 116045 [2021-12-06 17:34:08,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:34:08,514 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 926 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:08,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 882 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116045 states. [2021-12-06 17:34:11,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116045 to 90054. [2021-12-06 17:34:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90054 states, 90053 states have (on average 1.5301655691648253) internal successors, (137796), 90053 states have internal predecessors, (137796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90054 states to 90054 states and 137796 transitions. [2021-12-06 17:34:11,690 INFO L78 Accepts]: Start accepts. Automaton has 90054 states and 137796 transitions. Word has length 98 [2021-12-06 17:34:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:11,690 INFO L470 AbstractCegarLoop]: Abstraction has 90054 states and 137796 transitions. [2021-12-06 17:34:11,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 90054 states and 137796 transitions. [2021-12-06 17:34:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 17:34:11,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:11,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:11,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:34:11,692 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1611093686, now seen corresponding path program 1 times [2021-12-06 17:34:11,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411021335] [2021-12-06 17:34:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:11,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:34:11,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:11,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411021335] [2021-12-06 17:34:11,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411021335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:11,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:11,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:11,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948427063] [2021-12-06 17:34:11,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:11,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:11,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:11,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:11,729 INFO L87 Difference]: Start difference. First operand 90054 states and 137796 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:14,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:14,856 INFO L93 Difference]: Finished difference Result 144467 states and 222371 transitions. [2021-12-06 17:34:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:34:14,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 98 [2021-12-06 17:34:14,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:15,008 INFO L225 Difference]: With dead ends: 144467 [2021-12-06 17:34:15,008 INFO L226 Difference]: Without dead ends: 116505 [2021-12-06 17:34:15,042 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:34:15,042 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 189 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:15,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 559 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116505 states. [2021-12-06 17:34:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116505 to 112687. [2021-12-06 17:34:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112687 states, 112686 states have (on average 1.5310686331931207) internal successors, (172530), 112686 states have internal predecessors, (172530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112687 states to 112687 states and 172530 transitions. [2021-12-06 17:34:19,156 INFO L78 Accepts]: Start accepts. Automaton has 112687 states and 172530 transitions. Word has length 98 [2021-12-06 17:34:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:19,156 INFO L470 AbstractCegarLoop]: Abstraction has 112687 states and 172530 transitions. [2021-12-06 17:34:19,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 112687 states and 172530 transitions. [2021-12-06 17:34:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 17:34:19,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:19,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:19,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 17:34:19,159 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1798382351, now seen corresponding path program 1 times [2021-12-06 17:34:19,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:19,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984018562] [2021-12-06 17:34:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:19,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:19,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:19,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984018562] [2021-12-06 17:34:19,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984018562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:19,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:19,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:34:19,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564914328] [2021-12-06 17:34:19,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:19,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:34:19,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:34:19,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:34:19,208 INFO L87 Difference]: Start difference. First operand 112687 states and 172530 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:21,995 INFO L93 Difference]: Finished difference Result 203353 states and 311110 transitions. [2021-12-06 17:34:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:34:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2021-12-06 17:34:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:22,107 INFO L225 Difference]: With dead ends: 203353 [2021-12-06 17:34:22,107 INFO L226 Difference]: Without dead ends: 90739 [2021-12-06 17:34:22,168 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:34:22,168 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 73 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:22,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 401 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90739 states. [2021-12-06 17:34:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90739 to 83969. [2021-12-06 17:34:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83969 states, 83968 states have (on average 1.5210556402439024) internal successors, (127720), 83968 states have internal predecessors, (127720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83969 states to 83969 states and 127720 transitions. [2021-12-06 17:34:25,090 INFO L78 Accepts]: Start accepts. Automaton has 83969 states and 127720 transitions. Word has length 98 [2021-12-06 17:34:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:25,091 INFO L470 AbstractCegarLoop]: Abstraction has 83969 states and 127720 transitions. [2021-12-06 17:34:25,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 83969 states and 127720 transitions. [2021-12-06 17:34:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 17:34:25,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:25,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:25,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 17:34:25,093 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash 623495143, now seen corresponding path program 1 times [2021-12-06 17:34:25,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:25,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425817567] [2021-12-06 17:34:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:25,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:34:25,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:25,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425817567] [2021-12-06 17:34:25,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425817567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:25,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:25,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:25,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041631364] [2021-12-06 17:34:25,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:25,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:25,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:25,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:25,172 INFO L87 Difference]: Start difference. First operand 83969 states and 127720 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:30,290 INFO L93 Difference]: Finished difference Result 209219 states and 319403 transitions. [2021-12-06 17:34:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 98 [2021-12-06 17:34:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:30,495 INFO L225 Difference]: With dead ends: 209219 [2021-12-06 17:34:30,495 INFO L226 Difference]: Without dead ends: 151377 [2021-12-06 17:34:30,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:30,552 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 312 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:30,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 515 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151377 states. [2021-12-06 17:34:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151377 to 135002. [2021-12-06 17:34:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135002 states, 135001 states have (on average 1.5215665069147637) internal successors, (205413), 135001 states have internal predecessors, (205413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135002 states to 135002 states and 205413 transitions. [2021-12-06 17:34:35,683 INFO L78 Accepts]: Start accepts. Automaton has 135002 states and 205413 transitions. Word has length 98 [2021-12-06 17:34:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:35,683 INFO L470 AbstractCegarLoop]: Abstraction has 135002 states and 205413 transitions. [2021-12-06 17:34:35,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 135002 states and 205413 transitions. [2021-12-06 17:34:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 17:34:35,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:35,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:35,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 17:34:35,684 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash 466140484, now seen corresponding path program 1 times [2021-12-06 17:34:35,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:35,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812204405] [2021-12-06 17:34:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:35,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:34:35,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:35,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812204405] [2021-12-06 17:34:35,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812204405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:35,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:35,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:34:35,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782594817] [2021-12-06 17:34:35,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:35,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:34:35,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:34:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:34:35,712 INFO L87 Difference]: Start difference. First operand 135002 states and 205413 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:42,547 INFO L93 Difference]: Finished difference Result 281346 states and 429468 transitions. [2021-12-06 17:34:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:34:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-06 17:34:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:42,847 INFO L225 Difference]: With dead ends: 281346 [2021-12-06 17:34:42,848 INFO L226 Difference]: Without dead ends: 212860 [2021-12-06 17:34:43,052 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:34:43,053 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 73 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:43,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 337 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212860 states. [2021-12-06 17:34:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212860 to 212360. [2021-12-06 17:34:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212360 states, 212359 states have (on average 1.5215978602272566) internal successors, (323125), 212359 states have internal predecessors, (323125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212360 states to 212360 states and 323125 transitions. [2021-12-06 17:34:51,282 INFO L78 Accepts]: Start accepts. Automaton has 212360 states and 323125 transitions. Word has length 99 [2021-12-06 17:34:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,282 INFO L470 AbstractCegarLoop]: Abstraction has 212360 states and 323125 transitions. [2021-12-06 17:34:51,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 212360 states and 323125 transitions. [2021-12-06 17:34:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 17:34:51,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 17:34:51,283 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1487208838, now seen corresponding path program 1 times [2021-12-06 17:34:51,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749057880] [2021-12-06 17:34:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:34:51,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749057880] [2021-12-06 17:34:51,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749057880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:51,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26347617] [2021-12-06 17:34:51,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:51,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:51,319 INFO L87 Difference]: Start difference. First operand 212360 states and 323125 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:00,542 INFO L93 Difference]: Finished difference Result 341978 states and 522224 transitions. [2021-12-06 17:35:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:35:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-06 17:35:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:00,936 INFO L225 Difference]: With dead ends: 341978 [2021-12-06 17:35:00,936 INFO L226 Difference]: Without dead ends: 274916 [2021-12-06 17:35:01,004 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:35:01,005 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 179 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:01,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 644 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274916 states. [2021-12-06 17:35:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274916 to 251760. [2021-12-06 17:35:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251760 states, 251759 states have (on average 1.5200290754253076) internal successors, (382681), 251759 states have internal predecessors, (382681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251760 states to 251760 states and 382681 transitions. [2021-12-06 17:35:11,005 INFO L78 Accepts]: Start accepts. Automaton has 251760 states and 382681 transitions. Word has length 99 [2021-12-06 17:35:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:11,005 INFO L470 AbstractCegarLoop]: Abstraction has 251760 states and 382681 transitions. [2021-12-06 17:35:11,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 251760 states and 382681 transitions. [2021-12-06 17:35:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 17:35:11,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:11,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 17:35:11,006 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1289182160, now seen corresponding path program 1 times [2021-12-06 17:35:11,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:11,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006638581] [2021-12-06 17:35:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:11,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:11,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:11,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006638581] [2021-12-06 17:35:11,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006638581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:11,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:11,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:35:11,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319749376] [2021-12-06 17:35:11,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:11,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:35:11,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:11,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:35:11,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:35:11,038 INFO L87 Difference]: Start difference. First operand 251760 states and 382681 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:28,778 INFO L93 Difference]: Finished difference Result 746746 states and 1134066 transitions. [2021-12-06 17:35:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:35:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-06 17:35:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:29,571 INFO L225 Difference]: With dead ends: 746746 [2021-12-06 17:35:29,571 INFO L226 Difference]: Without dead ends: 495041 [2021-12-06 17:35:29,696 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:35:29,697 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 100 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:29,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 394 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495041 states. [2021-12-06 17:35:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495041 to 495039. [2021-12-06 17:35:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495039 states, 495038 states have (on average 1.5070681442636726) internal successors, (746056), 495038 states have internal predecessors, (746056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495039 states to 495039 states and 746056 transitions. [2021-12-06 17:35:51,002 INFO L78 Accepts]: Start accepts. Automaton has 495039 states and 746056 transitions. Word has length 100 [2021-12-06 17:35:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:51,003 INFO L470 AbstractCegarLoop]: Abstraction has 495039 states and 746056 transitions. [2021-12-06 17:35:51,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 495039 states and 746056 transitions. [2021-12-06 17:35:51,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 17:35:51,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:51,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:51,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 17:35:51,004 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1415273558, now seen corresponding path program 1 times [2021-12-06 17:35:51,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:51,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093750629] [2021-12-06 17:35:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:51,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:51,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:51,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093750629] [2021-12-06 17:35:51,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093750629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:51,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:51,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:35:51,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910244954] [2021-12-06 17:35:51,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:51,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:35:51,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:51,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:35:51,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:35:51,037 INFO L87 Difference]: Start difference. First operand 495039 states and 746056 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:27,465 INFO L93 Difference]: Finished difference Result 1469913 states and 2213031 transitions. [2021-12-06 17:36:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:36:27,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 100 [2021-12-06 17:36:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:29,263 INFO L225 Difference]: With dead ends: 1469913 [2021-12-06 17:36:29,263 INFO L226 Difference]: Without dead ends: 975003 [2021-12-06 17:36:29,532 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:36:29,532 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 146 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:29,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 474 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:36:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975003 states. [2021-12-06 17:37:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975003 to 975001. [2021-12-06 17:37:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975001 states, 975000 states have (on average 1.4946348717948719) internal successors, (1457269), 975000 states have internal predecessors, (1457269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975001 states to 975001 states and 1457269 transitions. [2021-12-06 17:37:12,833 INFO L78 Accepts]: Start accepts. Automaton has 975001 states and 1457269 transitions. Word has length 100 [2021-12-06 17:37:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:12,833 INFO L470 AbstractCegarLoop]: Abstraction has 975001 states and 1457269 transitions. [2021-12-06 17:37:12,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 975001 states and 1457269 transitions. [2021-12-06 17:37:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 17:37:12,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:12,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:12,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 17:37:12,836 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:37:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1239319387, now seen corresponding path program 1 times [2021-12-06 17:37:12,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:12,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423024950] [2021-12-06 17:37:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:12,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:37:12,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:12,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423024950] [2021-12-06 17:37:12,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423024950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:12,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928515658] [2021-12-06 17:37:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:12,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:12,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:12,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:12,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:37:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:12,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:37:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 17:37:13,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:37:13,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928515658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:37:13,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:37:13,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-06 17:37:13,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443590620] [2021-12-06 17:37:13,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:37:13,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:37:13,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:37:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:37:13,136 INFO L87 Difference]: Start difference. First operand 975001 states and 1457269 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:54,467 INFO L93 Difference]: Finished difference Result 1950017 states and 2914549 transitions. [2021-12-06 17:37:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:37:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-06 17:37:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:56,348 INFO L225 Difference]: With dead ends: 1950017 [2021-12-06 17:37:56,348 INFO L226 Difference]: Without dead ends: 975098 [2021-12-06 17:37:57,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:37:57,013 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 400 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:57,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 433 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:37:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975098 states. [2021-12-06 17:38:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975098 to 975096. [2021-12-06 17:38:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975096 states, 975095 states have (on average 1.4835323737687096) internal successors, (1446585), 975095 states have internal predecessors, (1446585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:38:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975096 states to 975096 states and 1446585 transitions. [2021-12-06 17:38:42,166 INFO L78 Accepts]: Start accepts. Automaton has 975096 states and 1446585 transitions. Word has length 102 [2021-12-06 17:38:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:42,166 INFO L470 AbstractCegarLoop]: Abstraction has 975096 states and 1446585 transitions. [2021-12-06 17:38:42,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:38:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 975096 states and 1446585 transitions. [2021-12-06 17:38:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 17:38:42,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:42,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:42,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:38:42,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4109c222-94a9-443b-b41c-3135e50d3bae/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 17:38:42,370 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:38:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash 644476693, now seen corresponding path program 1 times [2021-12-06 17:38:42,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:38:42,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329583321] [2021-12-06 17:38:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:42,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:38:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:38:42,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:38:42,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329583321] [2021-12-06 17:38:42,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329583321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:38:42,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:38:42,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:38:42,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890494200] [2021-12-06 17:38:42,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:38:42,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:38:42,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:38:42,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:38:42,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:38:42,411 INFO L87 Difference]: Start difference. First operand 975096 states and 1446585 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:27,318 INFO L93 Difference]: Finished difference Result 1503766 states and 2238246 transitions. [2021-12-06 17:39:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:39:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-06 17:39:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:29,293 INFO L225 Difference]: With dead ends: 1503766 [2021-12-06 17:39:29,293 INFO L226 Difference]: Without dead ends: 1109540 [2021-12-06 17:39:29,594 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:39:29,595 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 178 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:29,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 573 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:39:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109540 states. [2021-12-06 17:40:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109540 to 1098150. [2021-12-06 17:40:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098150 states, 1098149 states have (on average 1.4828306541279916) internal successors, (1628369), 1098149 states have internal predecessors, (1628369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:40:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098150 states to 1098150 states and 1628369 transitions. [2021-12-06 17:40:22,851 INFO L78 Accepts]: Start accepts. Automaton has 1098150 states and 1628369 transitions. Word has length 102 [2021-12-06 17:40:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:40:22,851 INFO L470 AbstractCegarLoop]: Abstraction has 1098150 states and 1628369 transitions. [2021-12-06 17:40:22,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:40:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1098150 states and 1628369 transitions. [2021-12-06 17:40:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 17:40:22,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:40:22,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:40:22,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 17:40:22,854 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:40:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:40:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -587590513, now seen corresponding path program 1 times [2021-12-06 17:40:22,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:40:22,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740468902] [2021-12-06 17:40:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:22,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:40:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:40:22,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:40:22,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740468902] [2021-12-06 17:40:22,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740468902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:40:22,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:40:22,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:40:22,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506133743] [2021-12-06 17:40:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:40:22,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:40:22,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:40:22,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:40:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:40:22,872 INFO L87 Difference]: Start difference. First operand 1098150 states and 1628369 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:54,445 INFO L93 Difference]: Finished difference Result 3294222 states and 4884797 transitions. [2021-12-06 17:41:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:41:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-06 17:41:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:58,440 INFO L225 Difference]: With dead ends: 3294222 [2021-12-06 17:41:58,440 INFO L226 Difference]: Without dead ends: 2196270 [2021-12-06 17:41:59,116 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:41:59,117 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 176 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:59,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 514 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:42:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196270 states. [2021-12-06 17:42:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196270 to 1098152. [2021-12-06 17:42:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098152 states, 1098151 states have (on average 1.4828297747759642) internal successors, (1628371), 1098151 states have internal predecessors, (1628371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098152 states to 1098152 states and 1628371 transitions. [2021-12-06 17:43:02,510 INFO L78 Accepts]: Start accepts. Automaton has 1098152 states and 1628371 transitions. Word has length 103 [2021-12-06 17:43:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:02,510 INFO L470 AbstractCegarLoop]: Abstraction has 1098152 states and 1628371 transitions. [2021-12-06 17:43:02,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1098152 states and 1628371 transitions. [2021-12-06 17:43:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 17:43:02,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:02,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:02,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 17:43:02,513 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:43:02,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:02,513 INFO L85 PathProgramCache]: Analyzing trace with hash 583302922, now seen corresponding path program 1 times [2021-12-06 17:43:02,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:02,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090337091] [2021-12-06 17:43:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:02,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:02,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090337091] [2021-12-06 17:43:02,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090337091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:02,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:02,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:43:02,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044546779] [2021-12-06 17:43:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:02,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:43:02,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:43:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:43:02,558 INFO L87 Difference]: Start difference. First operand 1098152 states and 1628371 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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)