./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.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_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/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_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/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_02c93874-7a11-4da0-8877-c4224949b630/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 0b2744f3415dbb18037af957678e462154c9b5d1903565ea0dc58b30d01826b2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:03:03,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:03:03,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:03:03,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:03:03,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:03:03,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:03:03,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:03:03,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:03:03,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:03:03,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:03:03,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:03:03,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:03:03,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:03:03,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:03:03,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:03:03,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:03:03,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:03:03,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:03:03,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:03:03,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:03:03,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:03:03,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:03:03,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:03:03,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:03:03,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:03:03,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:03:03,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:03:03,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:03:03,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:03:03,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:03:03,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:03:03,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:03:03,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:03:03,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:03:03,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:03:03,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:03:03,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:03:03,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:03:03,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:03:03,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:03:03,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:03:03,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:03:03,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:03:03,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:03:03,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:03:03,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:03:03,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:03:03,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:03:03,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:03:03,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:03:03,182 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:03:03,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:03:03,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:03:03,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:03:03,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:03:03,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:03:03,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:03:03,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:03:03,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:03:03,183 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:03:03,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:03:03,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:03:03,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:03:03,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:03:03,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:03:03,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:03:03,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:03:03,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:03:03,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:03:03,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:03:03,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:03:03,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:03:03,185 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:03:03,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:03:03,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:03:03,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:03:03,186 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_02c93874-7a11-4da0-8877-c4224949b630/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b2744f3415dbb18037af957678e462154c9b5d1903565ea0dc58b30d01826b2 [2021-12-06 21:03:03,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:03:03,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:03:03,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:03:03,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:03:03,390 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:03:03,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-06 21:03:03,437 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/data/7274a12a7/9ab45e8bc2284b5985893ed1eaa3b31b/FLAGeadcd65d5 [2021-12-06 21:03:03,907 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:03:03,907 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-06 21:03:03,922 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/data/7274a12a7/9ab45e8bc2284b5985893ed1eaa3b31b/FLAGeadcd65d5 [2021-12-06 21:03:03,933 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/data/7274a12a7/9ab45e8bc2284b5985893ed1eaa3b31b [2021-12-06 21:03:03,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:03:03,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:03:03,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:03:03,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:03:03,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:03:03,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:03:03" (1/1) ... [2021-12-06 21:03:03,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d111919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:03, skipping insertion in model container [2021-12-06 21:03:03,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:03:03" (1/1) ... [2021-12-06 21:03:03,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:03:04,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:03:04,484 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_02c93874-7a11-4da0-8877-c4224949b630/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34568,34581] [2021-12-06 21:03:04,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:03:04,648 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:03:04,878 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_02c93874-7a11-4da0-8877-c4224949b630/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34568,34581] [2021-12-06 21:03:04,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:03:05,003 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:03:05,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05 WrapperNode [2021-12-06 21:03:05,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:03:05,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:03:05,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:03:05,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:03:05,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,108 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2889 [2021-12-06 21:03:05,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:03:05,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:03:05,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:03:05,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:03:05,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:03:05,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:03:05,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:03:05,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:03:05,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (1/1) ... [2021-12-06 21:03:05,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:03:05,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:03:05,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:03:05,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02c93874-7a11-4da0-8877-c4224949b630/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:03:05,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:03:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:03:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:03:05,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:03:05,366 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:03:05,367 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:03:06,507 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:03:06,524 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:03:06,524 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 21:03:06,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:03:06 BoogieIcfgContainer [2021-12-06 21:03:06,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:03:06,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:03:06,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:03:06,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:03:06,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:03:03" (1/3) ... [2021-12-06 21:03:06,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af4ca5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:03:06, skipping insertion in model container [2021-12-06 21:03:06,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:03:05" (2/3) ... [2021-12-06 21:03:06,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af4ca5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:03:06, skipping insertion in model container [2021-12-06 21:03:06,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:03:06" (3/3) ... [2021-12-06 21:03:06,535 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-06 21:03:06,540 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:03:06,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:03:06,585 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:03:06,592 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 21:03:06,592 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:03:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 771 states, 769 states have (on average 1.786736020806242) internal successors, (1374), 770 states have internal predecessors, (1374), 0 states have call successors, (0), 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 21:03:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-06 21:03:06,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:06,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:06,653 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1478878914, now seen corresponding path program 1 times [2021-12-06 21:03:06,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:06,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806408087] [2021-12-06 21:03:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:06,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:07,129 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 21:03:07,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:07,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806408087] [2021-12-06 21:03:07,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806408087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:07,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:07,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:07,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49529818] [2021-12-06 21:03:07,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:07,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:07,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:07,172 INFO L87 Difference]: Start difference. First operand has 771 states, 769 states have (on average 1.786736020806242) internal successors, (1374), 770 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 21:03:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:07,376 INFO L93 Difference]: Finished difference Result 1385 states and 2441 transitions. [2021-12-06 21:03:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 316 [2021-12-06 21:03:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:07,401 INFO L225 Difference]: With dead ends: 1385 [2021-12-06 21:03:07,401 INFO L226 Difference]: Without dead ends: 1215 [2021-12-06 21:03:07,405 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 21:03:07,408 INFO L933 BasicCegarLoop]: 1313 mSDtfsCounter, 804 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:07,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 2362 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:03:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-12-06 21:03:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1213. [2021-12-06 21:03:07,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 1.5627062706270627) internal successors, (1894), 1212 states have internal predecessors, (1894), 0 states have call successors, (0), 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 21:03:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1894 transitions. [2021-12-06 21:03:07,546 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1894 transitions. Word has length 316 [2021-12-06 21:03:07,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:07,548 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1894 transitions. [2021-12-06 21:03:07,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 21:03:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1894 transitions. [2021-12-06 21:03:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-06 21:03:07,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:07,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:07,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:03:07,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1649206099, now seen corresponding path program 1 times [2021-12-06 21:03:07,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:07,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667682481] [2021-12-06 21:03:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:07,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:07,994 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 21:03:07,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:07,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667682481] [2021-12-06 21:03:07,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667682481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:07,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:07,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:03:07,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269703162] [2021-12-06 21:03:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:07,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:03:07,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:03:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:03:07,998 INFO L87 Difference]: Start difference. First operand 1213 states and 1894 transitions. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 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 21:03:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:08,153 INFO L93 Difference]: Finished difference Result 3587 states and 5593 transitions. [2021-12-06 21:03:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:03:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 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 316 [2021-12-06 21:03:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:08,164 INFO L225 Difference]: With dead ends: 3587 [2021-12-06 21:03:08,165 INFO L226 Difference]: Without dead ends: 2385 [2021-12-06 21:03:08,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:03:08,169 INFO L933 BasicCegarLoop]: 1812 mSDtfsCounter, 2779 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2779 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:08,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2779 Valid, 2949 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:03:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-12-06 21:03:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2383. [2021-12-06 21:03:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2383 states, 2382 states have (on average 1.5528967254408061) internal successors, (3699), 2382 states have internal predecessors, (3699), 0 states have call successors, (0), 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 21:03:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 3699 transitions. [2021-12-06 21:03:08,262 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 3699 transitions. Word has length 316 [2021-12-06 21:03:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:08,262 INFO L470 AbstractCegarLoop]: Abstraction has 2383 states and 3699 transitions. [2021-12-06 21:03:08,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 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 21:03:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 3699 transitions. [2021-12-06 21:03:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-12-06 21:03:08,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:08,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:08,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:03:08,269 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:08,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1029364850, now seen corresponding path program 1 times [2021-12-06 21:03:08,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:08,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925120494] [2021-12-06 21:03:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:08,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:08,337 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 21:03:08,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:08,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925120494] [2021-12-06 21:03:08,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925120494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:08,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:08,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:08,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636255499] [2021-12-06 21:03:08,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:08,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:08,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:08,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:08,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:08,340 INFO L87 Difference]: Start difference. First operand 2383 states and 3699 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 21:03:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:08,544 INFO L93 Difference]: Finished difference Result 7112 states and 11034 transitions. [2021-12-06 21:03:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 318 [2021-12-06 21:03:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:08,573 INFO L225 Difference]: With dead ends: 7112 [2021-12-06 21:03:08,573 INFO L226 Difference]: Without dead ends: 4750 [2021-12-06 21:03:08,578 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 21:03:08,579 INFO L933 BasicCegarLoop]: 2380 mSDtfsCounter, 1187 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:08,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 3568 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:03:08,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2021-12-06 21:03:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 2396. [2021-12-06 21:03:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 1.552400835073069) internal successors, (3718), 2395 states have internal predecessors, (3718), 0 states have call successors, (0), 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 21:03:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3718 transitions. [2021-12-06 21:03:08,691 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3718 transitions. Word has length 318 [2021-12-06 21:03:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:08,691 INFO L470 AbstractCegarLoop]: Abstraction has 2396 states and 3718 transitions. [2021-12-06 21:03:08,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 21:03:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3718 transitions. [2021-12-06 21:03:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-12-06 21:03:08,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:08,701 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:08,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:03:08,701 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -528855671, now seen corresponding path program 1 times [2021-12-06 21:03:08,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:08,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259944450] [2021-12-06 21:03:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:08,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:08,808 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 21:03:08,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:08,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259944450] [2021-12-06 21:03:08,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259944450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:08,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:08,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:08,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344259869] [2021-12-06 21:03:08,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:08,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:08,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:08,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:08,811 INFO L87 Difference]: Start difference. First operand 2396 states and 3718 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 21:03:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:09,022 INFO L93 Difference]: Finished difference Result 6949 states and 10745 transitions. [2021-12-06 21:03:09,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:09,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 318 [2021-12-06 21:03:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:09,042 INFO L225 Difference]: With dead ends: 6949 [2021-12-06 21:03:09,042 INFO L226 Difference]: Without dead ends: 4691 [2021-12-06 21:03:09,046 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 21:03:09,047 INFO L933 BasicCegarLoop]: 2325 mSDtfsCounter, 1059 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 3462 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:09,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 3462 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:03:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-12-06 21:03:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4689. [2021-12-06 21:03:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4689 states, 4688 states have (on average 1.54330204778157) internal successors, (7235), 4688 states have internal predecessors, (7235), 0 states have call successors, (0), 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 21:03:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4689 states to 4689 states and 7235 transitions. [2021-12-06 21:03:09,237 INFO L78 Accepts]: Start accepts. Automaton has 4689 states and 7235 transitions. Word has length 318 [2021-12-06 21:03:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:09,237 INFO L470 AbstractCegarLoop]: Abstraction has 4689 states and 7235 transitions. [2021-12-06 21:03:09,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 21:03:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4689 states and 7235 transitions. [2021-12-06 21:03:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-12-06 21:03:09,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:09,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:09,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:03:09,245 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1432087453, now seen corresponding path program 1 times [2021-12-06 21:03:09,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:09,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772865154] [2021-12-06 21:03:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:09,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:09,314 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 21:03:09,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772865154] [2021-12-06 21:03:09,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772865154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:09,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:09,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:09,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314267589] [2021-12-06 21:03:09,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:09,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:09,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:09,317 INFO L87 Difference]: Start difference. First operand 4689 states and 7235 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 21:03:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:09,636 INFO L93 Difference]: Finished difference Result 13962 states and 21526 transitions. [2021-12-06 21:03:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 319 [2021-12-06 21:03:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:09,677 INFO L225 Difference]: With dead ends: 13962 [2021-12-06 21:03:09,677 INFO L226 Difference]: Without dead ends: 9329 [2021-12-06 21:03:09,683 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 21:03:09,684 INFO L933 BasicCegarLoop]: 2379 mSDtfsCounter, 1182 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:09,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 3567 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:03:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2021-12-06 21:03:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 4707. [2021-12-06 21:03:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4707 states, 4706 states have (on average 1.5418614534636634) internal successors, (7256), 4706 states have internal predecessors, (7256), 0 states have call successors, (0), 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 21:03:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4707 states to 4707 states and 7256 transitions. [2021-12-06 21:03:09,890 INFO L78 Accepts]: Start accepts. Automaton has 4707 states and 7256 transitions. Word has length 319 [2021-12-06 21:03:09,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:09,891 INFO L470 AbstractCegarLoop]: Abstraction has 4707 states and 7256 transitions. [2021-12-06 21:03:09,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 21:03:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4707 states and 7256 transitions. [2021-12-06 21:03:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-12-06 21:03:09,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:09,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:09,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:03:09,898 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:09,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash -131705436, now seen corresponding path program 1 times [2021-12-06 21:03:09,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:09,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685631177] [2021-12-06 21:03:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:09,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:09,976 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 21:03:09,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:09,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685631177] [2021-12-06 21:03:09,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685631177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:09,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:09,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:09,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976108318] [2021-12-06 21:03:09,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:09,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:09,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:09,979 INFO L87 Difference]: Start difference. First operand 4707 states and 7256 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 21:03:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:10,352 INFO L93 Difference]: Finished difference Result 13598 states and 20881 transitions. [2021-12-06 21:03:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:10,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 320 [2021-12-06 21:03:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:10,384 INFO L225 Difference]: With dead ends: 13598 [2021-12-06 21:03:10,384 INFO L226 Difference]: Without dead ends: 9132 [2021-12-06 21:03:10,391 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 21:03:10,392 INFO L933 BasicCegarLoop]: 2332 mSDtfsCounter, 1053 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:10,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 3469 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:03:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9132 states. [2021-12-06 21:03:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9132 to 9130. [2021-12-06 21:03:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9130 states, 9129 states have (on average 1.5305071749370138) internal successors, (13972), 9129 states have internal predecessors, (13972), 0 states have call successors, (0), 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 21:03:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9130 states to 9130 states and 13972 transitions. [2021-12-06 21:03:10,787 INFO L78 Accepts]: Start accepts. Automaton has 9130 states and 13972 transitions. Word has length 320 [2021-12-06 21:03:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:10,787 INFO L470 AbstractCegarLoop]: Abstraction has 9130 states and 13972 transitions. [2021-12-06 21:03:10,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 21:03:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 9130 states and 13972 transitions. [2021-12-06 21:03:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-12-06 21:03:10,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:10,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:10,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:03:10,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash 570948353, now seen corresponding path program 1 times [2021-12-06 21:03:10,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:10,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703976866] [2021-12-06 21:03:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:10,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:11,109 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 21:03:11,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:11,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703976866] [2021-12-06 21:03:11,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703976866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:11,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:11,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:03:11,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302844826] [2021-12-06 21:03:11,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:11,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:03:11,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:11,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:03:11,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:11,112 INFO L87 Difference]: Start difference. First operand 9130 states and 13972 transitions. Second operand has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 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 21:03:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:11,631 INFO L93 Difference]: Finished difference Result 26812 states and 40949 transitions. [2021-12-06 21:03:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:03:11,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 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 320 [2021-12-06 21:03:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:11,670 INFO L225 Difference]: With dead ends: 26812 [2021-12-06 21:03:11,670 INFO L226 Difference]: Without dead ends: 17737 [2021-12-06 21:03:11,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:11,680 INFO L933 BasicCegarLoop]: 1857 mSDtfsCounter, 3392 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:11,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3392 Valid, 2994 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:03:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17737 states. [2021-12-06 21:03:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17737 to 17735. [2021-12-06 21:03:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17735 states, 17734 states have (on average 1.5184955452802527) internal successors, (26929), 17734 states have internal predecessors, (26929), 0 states have call successors, (0), 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 21:03:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17735 states to 17735 states and 26929 transitions. [2021-12-06 21:03:12,268 INFO L78 Accepts]: Start accepts. Automaton has 17735 states and 26929 transitions. Word has length 320 [2021-12-06 21:03:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:12,269 INFO L470 AbstractCegarLoop]: Abstraction has 17735 states and 26929 transitions. [2021-12-06 21:03:12,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 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 21:03:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 17735 states and 26929 transitions. [2021-12-06 21:03:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-06 21:03:12,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:12,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:12,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:03:12,288 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1126698245, now seen corresponding path program 1 times [2021-12-06 21:03:12,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:12,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443146402] [2021-12-06 21:03:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:12,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:12,475 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 21:03:12,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:12,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443146402] [2021-12-06 21:03:12,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443146402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:12,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:12,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:03:12,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866954526] [2021-12-06 21:03:12,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:12,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:03:12,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:12,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:03:12,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:03:12,476 INFO L87 Difference]: Start difference. First operand 17735 states and 26929 transitions. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 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 21:03:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:13,607 INFO L93 Difference]: Finished difference Result 52147 states and 79039 transitions. [2021-12-06 21:03:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:03:13,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 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 322 [2021-12-06 21:03:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:13,652 INFO L225 Difference]: With dead ends: 52147 [2021-12-06 21:03:13,653 INFO L226 Difference]: Without dead ends: 34609 [2021-12-06 21:03:13,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:03:13,670 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 2728 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2728 SdHoareTripleChecker+Valid, 2898 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:13,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2728 Valid, 2898 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:03:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34609 states. [2021-12-06 21:03:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34609 to 34607. [2021-12-06 21:03:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34607 states, 34606 states have (on average 1.5063283823614402) internal successors, (52128), 34606 states have internal predecessors, (52128), 0 states have call successors, (0), 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 21:03:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34607 states to 34607 states and 52128 transitions. [2021-12-06 21:03:14,844 INFO L78 Accepts]: Start accepts. Automaton has 34607 states and 52128 transitions. Word has length 322 [2021-12-06 21:03:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:14,845 INFO L470 AbstractCegarLoop]: Abstraction has 34607 states and 52128 transitions. [2021-12-06 21:03:14,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 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 21:03:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34607 states and 52128 transitions. [2021-12-06 21:03:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-06 21:03:14,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:14,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:14,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:03:14,887 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash -36869400, now seen corresponding path program 1 times [2021-12-06 21:03:14,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:14,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876599251] [2021-12-06 21:03:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:14,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:14,969 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 21:03:14,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876599251] [2021-12-06 21:03:14,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876599251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:14,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:14,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:14,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5451300] [2021-12-06 21:03:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:14,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:14,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:14,971 INFO L87 Difference]: Start difference. First operand 34607 states and 52128 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 21:03:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:16,988 INFO L93 Difference]: Finished difference Result 101397 states and 152320 transitions. [2021-12-06 21:03:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:16,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 324 [2021-12-06 21:03:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:17,067 INFO L225 Difference]: With dead ends: 101397 [2021-12-06 21:03:17,068 INFO L226 Difference]: Without dead ends: 67683 [2021-12-06 21:03:17,098 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 21:03:17,098 INFO L933 BasicCegarLoop]: 2288 mSDtfsCounter, 1033 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:17,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1033 Valid, 3425 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:03:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67683 states. [2021-12-06 21:03:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67683 to 67681. [2021-12-06 21:03:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67681 states, 67680 states have (on average 1.495065011820331) internal successors, (101186), 67680 states have internal predecessors, (101186), 0 states have call successors, (0), 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 21:03:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67681 states to 67681 states and 101186 transitions. [2021-12-06 21:03:19,834 INFO L78 Accepts]: Start accepts. Automaton has 67681 states and 101186 transitions. Word has length 324 [2021-12-06 21:03:19,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:19,834 INFO L470 AbstractCegarLoop]: Abstraction has 67681 states and 101186 transitions. [2021-12-06 21:03:19,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 21:03:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 67681 states and 101186 transitions. [2021-12-06 21:03:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-06 21:03:19,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:19,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:19,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 21:03:19,904 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:19,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1237423955, now seen corresponding path program 1 times [2021-12-06 21:03:19,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:19,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042888156] [2021-12-06 21:03:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:19,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:19,955 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 21:03:19,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:19,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042888156] [2021-12-06 21:03:19,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042888156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:19,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:19,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:19,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730998574] [2021-12-06 21:03:19,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:19,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:19,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:19,957 INFO L87 Difference]: Start difference. First operand 67681 states and 101186 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 21:03:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:23,720 INFO L93 Difference]: Finished difference Result 202247 states and 302252 transitions. [2021-12-06 21:03:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:23,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 324 [2021-12-06 21:03:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:23,897 INFO L225 Difference]: With dead ends: 202247 [2021-12-06 21:03:23,898 INFO L226 Difference]: Without dead ends: 135009 [2021-12-06 21:03:23,945 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 21:03:23,946 INFO L933 BasicCegarLoop]: 2347 mSDtfsCounter, 1154 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:23,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 3535 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:03:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135009 states. [2021-12-06 21:03:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135009 to 67871. [2021-12-06 21:03:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67871 states, 67870 states have (on average 1.4950051569176366) internal successors, (101466), 67870 states have internal predecessors, (101466), 0 states have call successors, (0), 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 21:03:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67871 states to 67871 states and 101466 transitions. [2021-12-06 21:03:27,595 INFO L78 Accepts]: Start accepts. Automaton has 67871 states and 101466 transitions. Word has length 324 [2021-12-06 21:03:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:27,596 INFO L470 AbstractCegarLoop]: Abstraction has 67871 states and 101466 transitions. [2021-12-06 21:03:27,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 21:03:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 67871 states and 101466 transitions. [2021-12-06 21:03:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-06 21:03:27,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:27,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:27,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 21:03:27,666 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash -109574562, now seen corresponding path program 1 times [2021-12-06 21:03:27,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:27,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038771409] [2021-12-06 21:03:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:27,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:27,721 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 21:03:27,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:27,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038771409] [2021-12-06 21:03:27,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038771409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:27,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:27,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:27,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137679702] [2021-12-06 21:03:27,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:27,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:27,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:27,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:27,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:27,724 INFO L87 Difference]: Start difference. First operand 67871 states and 101466 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 21:03:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:32,186 INFO L93 Difference]: Finished difference Result 202359 states and 302330 transitions. [2021-12-06 21:03:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 325 [2021-12-06 21:03:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:32,361 INFO L225 Difference]: With dead ends: 202359 [2021-12-06 21:03:32,361 INFO L226 Difference]: Without dead ends: 135171 [2021-12-06 21:03:32,410 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 21:03:32,411 INFO L933 BasicCegarLoop]: 2347 mSDtfsCounter, 1149 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:32,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 3535 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:03:32,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135171 states. [2021-12-06 21:03:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135171 to 68033. [2021-12-06 21:03:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68033 states, 68032 states have (on average 1.4941792097836313) internal successors, (101652), 68032 states have internal predecessors, (101652), 0 states have call successors, (0), 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 21:03:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68033 states to 68033 states and 101652 transitions. [2021-12-06 21:03:35,759 INFO L78 Accepts]: Start accepts. Automaton has 68033 states and 101652 transitions. Word has length 325 [2021-12-06 21:03:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:35,759 INFO L470 AbstractCegarLoop]: Abstraction has 68033 states and 101652 transitions. [2021-12-06 21:03:35,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 21:03:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 68033 states and 101652 transitions. [2021-12-06 21:03:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-06 21:03:35,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:35,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:35,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 21:03:35,814 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1287551293, now seen corresponding path program 1 times [2021-12-06 21:03:35,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:35,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750596374] [2021-12-06 21:03:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:35,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:35,890 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 21:03:35,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750596374] [2021-12-06 21:03:35,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750596374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:35,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:35,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:03:35,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408776384] [2021-12-06 21:03:35,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:35,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:35,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:35,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:03:35,892 INFO L87 Difference]: Start difference. First operand 68033 states and 101652 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 21:03:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:41,454 INFO L93 Difference]: Finished difference Result 199139 states and 296842 transitions. [2021-12-06 21:03:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 326 [2021-12-06 21:03:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:41,632 INFO L225 Difference]: With dead ends: 199139 [2021-12-06 21:03:41,632 INFO L226 Difference]: Without dead ends: 132649 [2021-12-06 21:03:41,676 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 21:03:41,676 INFO L933 BasicCegarLoop]: 2299 mSDtfsCounter, 1027 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 3436 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:41,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 3436 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:03:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132649 states. [2021-12-06 21:03:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132649 to 132647. [2021-12-06 21:03:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132647 states, 132646 states have (on average 1.4824269107247863) internal successors, (196638), 132646 states have internal predecessors, (196638), 0 states have call successors, (0), 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 21:03:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132647 states to 132647 states and 196638 transitions. [2021-12-06 21:03:47,509 INFO L78 Accepts]: Start accepts. Automaton has 132647 states and 196638 transitions. Word has length 326 [2021-12-06 21:03:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:47,509 INFO L470 AbstractCegarLoop]: Abstraction has 132647 states and 196638 transitions. [2021-12-06 21:03:47,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 21:03:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 132647 states and 196638 transitions. [2021-12-06 21:03:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-06 21:03:47,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:47,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:47,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:03:47,626 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash 992851424, now seen corresponding path program 1 times [2021-12-06 21:03:47,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501936357] [2021-12-06 21:03:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:47,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:47,804 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 21:03:47,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:47,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501936357] [2021-12-06 21:03:47,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501936357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:47,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:47,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:03:47,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781440208] [2021-12-06 21:03:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:47,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:03:47,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:47,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:03:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:47,806 INFO L87 Difference]: Start difference. First operand 132647 states and 196638 transitions. Second operand has 5 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 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 21:03:58,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:58,533 INFO L93 Difference]: Finished difference Result 389685 states and 576312 transitions. [2021-12-06 21:03:58,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:03:58,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 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 326 [2021-12-06 21:03:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:58,918 INFO L225 Difference]: With dead ends: 389685 [2021-12-06 21:03:58,919 INFO L226 Difference]: Without dead ends: 257657 [2021-12-06 21:03:59,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:59,023 INFO L933 BasicCegarLoop]: 1662 mSDtfsCounter, 3325 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3325 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:59,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3325 Valid, 2789 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:03:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257657 states. [2021-12-06 21:04:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257657 to 257655. [2021-12-06 21:04:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257655 states, 257654 states have (on average 1.4686129460439195) internal successors, (378394), 257654 states have internal predecessors, (378394), 0 states have call successors, (0), 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 21:04:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257655 states to 257655 states and 378394 transitions. [2021-12-06 21:04:11,266 INFO L78 Accepts]: Start accepts. Automaton has 257655 states and 378394 transitions. Word has length 326 [2021-12-06 21:04:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:04:11,266 INFO L470 AbstractCegarLoop]: Abstraction has 257655 states and 378394 transitions. [2021-12-06 21:04:11,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 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 21:04:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 257655 states and 378394 transitions. [2021-12-06 21:04:11,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-06 21:04:11,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:04:11,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:11,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:04:11,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:04:11,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:04:11,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2000566015, now seen corresponding path program 1 times [2021-12-06 21:04:11,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:04:11,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571755144] [2021-12-06 21:04:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:04:11,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:04:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:11,534 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 21:04:11,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:04:11,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571755144] [2021-12-06 21:04:11,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571755144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:04:11,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:04:11,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:04:11,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443074098] [2021-12-06 21:04:11,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:04:11,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:04:11,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:04:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:04:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:04:11,537 INFO L87 Difference]: Start difference. First operand 257655 states and 378394 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 21:04:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:04:33,178 INFO L93 Difference]: Finished difference Result 753133 states and 1102322 transitions. [2021-12-06 21:04:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:04:33,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 328 [2021-12-06 21:04:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:04:33,997 INFO L225 Difference]: With dead ends: 753133 [2021-12-06 21:04:33,997 INFO L226 Difference]: Without dead ends: 501987 [2021-12-06 21:04:34,180 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 21:04:34,181 INFO L933 BasicCegarLoop]: 2317 mSDtfsCounter, 1046 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:04:34,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 3454 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:04:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501987 states. [2021-12-06 21:04:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501987 to 501985. [2021-12-06 21:04:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501985 states, 501984 states have (on average 1.4553770638107988) internal successors, (730576), 501984 states have internal predecessors, (730576), 0 states have call successors, (0), 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 21:05:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501985 states to 501985 states and 730576 transitions. [2021-12-06 21:05:00,782 INFO L78 Accepts]: Start accepts. Automaton has 501985 states and 730576 transitions. Word has length 328 [2021-12-06 21:05:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:05:00,783 INFO L470 AbstractCegarLoop]: Abstraction has 501985 states and 730576 transitions. [2021-12-06 21:05:00,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 21:05:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 501985 states and 730576 transitions. [2021-12-06 21:05:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-06 21:05:01,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:05:01,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:01,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 21:05:01,319 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:05:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:05:01,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1068861788, now seen corresponding path program 1 times [2021-12-06 21:05:01,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:05:01,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112434352] [2021-12-06 21:05:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:05:01,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:05:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:05:01,477 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 21:05:01,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:05:01,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112434352] [2021-12-06 21:05:01,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112434352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:05:01,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:05:01,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:05:01,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589498066] [2021-12-06 21:05:01,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:05:01,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:05:01,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:05:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:05:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:05:01,479 INFO L87 Difference]: Start difference. First operand 501985 states and 730576 transitions. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 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 21:05:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:05:45,906 INFO L93 Difference]: Finished difference Result 1479162 states and 2147406 transitions. [2021-12-06 21:05:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:05:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 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 328 [2021-12-06 21:05:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:05:47,886 INFO L225 Difference]: With dead ends: 1479162 [2021-12-06 21:05:47,886 INFO L226 Difference]: Without dead ends: 978634 [2021-12-06 21:05:48,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:05:48,259 INFO L933 BasicCegarLoop]: 1836 mSDtfsCounter, 3795 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3795 SdHoareTripleChecker+Valid, 2963 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:05:48,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3795 Valid, 2963 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:05:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978634 states. [2021-12-06 21:06:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978634 to 978632. [2021-12-06 21:06:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978632 states, 978631 states have (on average 1.4408209018516682) internal successors, (1410032), 978631 states have internal predecessors, (1410032), 0 states have call successors, (0), 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 21:06:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978632 states to 978632 states and 1410032 transitions. [2021-12-06 21:06:42,747 INFO L78 Accepts]: Start accepts. Automaton has 978632 states and 1410032 transitions. Word has length 328 [2021-12-06 21:06:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:06:42,748 INFO L470 AbstractCegarLoop]: Abstraction has 978632 states and 1410032 transitions. [2021-12-06 21:06:42,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 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 21:06:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 978632 states and 1410032 transitions. [2021-12-06 21:06:43,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-06 21:06:43,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:06:43,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:06:43,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 21:06:43,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:06:43,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:06:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash 659513416, now seen corresponding path program 1 times [2021-12-06 21:06:43,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:06:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279482591] [2021-12-06 21:06:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:06:43,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:06:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:44,103 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 21:06:44,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:06:44,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279482591] [2021-12-06 21:06:44,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279482591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:06:44,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:06:44,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:06:44,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297770829] [2021-12-06 21:06:44,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:06:44,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:06:44,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:06:44,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:06:44,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:06:44,105 INFO L87 Difference]: Start difference. First operand 978632 states and 1410032 transitions. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 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 21:07:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:37,574 INFO L93 Difference]: Finished difference Result 2038618 states and 2937783 transitions. [2021-12-06 21:07:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:07:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 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 328 [2021-12-06 21:07:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:39,504 INFO L225 Difference]: With dead ends: 2038618 [2021-12-06 21:07:39,505 INFO L226 Difference]: Without dead ends: 1064224 [2021-12-06 21:07:40,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:07:40,364 INFO L933 BasicCegarLoop]: 1750 mSDtfsCounter, 2698 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2698 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:40,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2698 Valid, 2877 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:07:41,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064224 states. [2021-12-06 21:08:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064224 to 980422. [2021-12-06 21:08:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980422 states, 980421 states have (on average 1.4405923577728343) internal successors, (1412387), 980421 states have internal predecessors, (1412387), 0 states have call successors, (0), 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 21:08:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980422 states to 980422 states and 1412387 transitions. [2021-12-06 21:08:38,024 INFO L78 Accepts]: Start accepts. Automaton has 980422 states and 1412387 transitions. Word has length 328 [2021-12-06 21:08:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:38,025 INFO L470 AbstractCegarLoop]: Abstraction has 980422 states and 1412387 transitions. [2021-12-06 21:08:38,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 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 21:08:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 980422 states and 1412387 transitions. [2021-12-06 21:08:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-06 21:08:39,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:39,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:39,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 21:08:39,083 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:39,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1903659185, now seen corresponding path program 1 times [2021-12-06 21:08:39,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:39,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477809602] [2021-12-06 21:08:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:39,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:39,133 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 21:08:39,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:39,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477809602] [2021-12-06 21:08:39,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477809602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:08:39,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:08:39,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:08:39,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134635798] [2021-12-06 21:08:39,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:08:39,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:08:39,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:39,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:08:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:08:39,135 INFO L87 Difference]: Start difference. First operand 980422 states and 1412387 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 21:10:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:18,050 INFO L93 Difference]: Finished difference Result 2927984 states and 4216663 transitions. [2021-12-06 21:10:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:10:18,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 330 [2021-12-06 21:10:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:21,832 INFO L225 Difference]: With dead ends: 2927984 [2021-12-06 21:10:21,833 INFO L226 Difference]: Without dead ends: 1953590 [2021-12-06 21:10:22,724 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 21:10:22,725 INFO L933 BasicCegarLoop]: 2314 mSDtfsCounter, 1121 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:22,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 3502 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:10:24,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953590 states. [2021-12-06 21:11:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953590 to 982788. [2021-12-06 21:11:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982788 states, 982787 states have (on average 1.4402805490915123) internal successors, (1415489), 982787 states have internal predecessors, (1415489), 0 states have call successors, (0), 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 21:11:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982788 states to 982788 states and 1415489 transitions. [2021-12-06 21:11:40,414 INFO L78 Accepts]: Start accepts. Automaton has 982788 states and 1415489 transitions. Word has length 330 [2021-12-06 21:11:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:40,415 INFO L470 AbstractCegarLoop]: Abstraction has 982788 states and 1415489 transitions. [2021-12-06 21:11:40,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 21:11:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 982788 states and 1415489 transitions. [2021-12-06 21:11:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-06 21:11:41,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:41,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:41,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 21:11:41,488 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:11:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:41,488 INFO L85 PathProgramCache]: Analyzing trace with hash 860898004, now seen corresponding path program 1 times [2021-12-06 21:11:41,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:41,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170734231] [2021-12-06 21:11:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:41,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:41,535 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 21:11:41,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:41,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170734231] [2021-12-06 21:11:41,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170734231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:11:41,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:11:41,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:11:41,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470466966] [2021-12-06 21:11:41,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:11:41,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:11:41,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:41,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:11:41,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:11:41,537 INFO L87 Difference]: Start difference. First operand 982788 states and 1415489 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)