./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX --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 9260884558ccc913fea23720ea19c1107cd16edf25af23049028c38b098feff1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:29:51,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:29:51,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:29:51,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:29:51,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:29:51,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:29:51,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:29:51,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:29:51,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:29:51,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:29:51,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:29:51,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:29:51,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:29:51,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:29:52,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:29:52,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:29:52,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:29:52,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:29:52,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:29:52,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:29:52,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:29:52,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:29:52,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:29:52,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:29:52,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:29:52,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:29:52,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:29:52,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:29:52,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:29:52,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:29:52,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:29:52,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:29:52,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:29:52,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:29:52,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:29:52,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:29:52,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:29:52,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:29:52,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:29:52,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:29:52,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:29:52,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:29:52,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:29:52,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:29:52,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:29:52,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:29:52,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:29:52,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:29:52,077 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:29:52,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:29:52,077 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:29:52,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:29:52,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:29:52,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:29:52,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:29:52,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:29:52,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:29:52,080 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:29:52,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:29:52,081 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:29:52,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:29:52,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:29:52,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:29:52,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:29:52,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:29:52,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:29:52,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:29:52,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:29:52,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:29:52,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:29:52,085 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:29:52,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:29:52,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:29:52,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:29:52,086 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_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9260884558ccc913fea23720ea19c1107cd16edf25af23049028c38b098feff1 [2021-11-09 08:29:52,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:29:52,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:29:52,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:29:52,417 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:29:52,418 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:29:52,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-09 08:29:52,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/data/233716e68/c23a8d53fefc45af91124948e05fbfbf/FLAGe5db4da8b [2021-11-09 08:29:53,090 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:29:53,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-09 08:29:53,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/data/233716e68/c23a8d53fefc45af91124948e05fbfbf/FLAGe5db4da8b [2021-11-09 08:29:53,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/data/233716e68/c23a8d53fefc45af91124948e05fbfbf [2021-11-09 08:29:53,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:29:53,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:29:53,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:53,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:29:53,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:29:53,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:53" (1/1) ... [2021-11-09 08:29:53,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@511de5eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:53, skipping insertion in model container [2021-11-09 08:29:53,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:53" (1/1) ... [2021-11-09 08:29:53,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:29:53,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:29:53,739 WARN L228 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_ca12ca91-9adf-4629-ac04-f0229b1f292e/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15864,15877] [2021-11-09 08:29:53,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:53,851 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:29:54,012 WARN L228 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_ca12ca91-9adf-4629-ac04-f0229b1f292e/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15864,15877] [2021-11-09 08:29:54,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:54,120 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:29:54,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54 WrapperNode [2021-11-09 08:29:54,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:54,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:29:54,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:29:54,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:29:54,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:29:54,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:29:54,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:29:54,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:29:54,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:29:54,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:29:54,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:29:54,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:29:54,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:29:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:54,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:29:54,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca12ca91-9adf-4629-ac04-f0229b1f292e/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:29:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:29:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:29:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:29:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:29:55,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:29:55,750 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 08:29:55,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:55 BoogieIcfgContainer [2021-11-09 08:29:55,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:29:55,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:29:55,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:29:55,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:29:55,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:29:53" (1/3) ... [2021-11-09 08:29:55,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79aef456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:29:55, skipping insertion in model container [2021-11-09 08:29:55,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (2/3) ... [2021-11-09 08:29:55,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79aef456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:29:55, skipping insertion in model container [2021-11-09 08:29:55,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:55" (3/3) ... [2021-11-09 08:29:55,761 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-09 08:29:55,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:29:55,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:29:55,830 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:29:55,857 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 [2021-11-09 08:29:55,857 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:29:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 342 states have (on average 1.7690058479532165) internal successors, (605), 343 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-09 08:29:55,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:55,925 INFO L513 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] [2021-11-09 08:29:55,925 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1491324598, now seen corresponding path program 1 times [2021-11-09 08:29:55,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:55,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385800435] [2021-11-09 08:29:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:55,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:56,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:56,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385800435] [2021-11-09 08:29:56,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385800435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:56,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:56,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:29:56,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047331887] [2021-11-09 08:29:56,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:29:56,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:29:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:29:56,610 INFO L87 Difference]: Start difference. First operand has 344 states, 342 states have (on average 1.7690058479532165) internal successors, (605), 343 states have internal predecessors, (605), 0 states have call successors, (0), 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 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:56,769 INFO L93 Difference]: Finished difference Result 702 states and 1220 transitions. [2021-11-09 08:29:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:29:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-11-09 08:29:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:56,802 INFO L225 Difference]: With dead ends: 702 [2021-11-09 08:29:56,802 INFO L226 Difference]: Without dead ends: 565 [2021-11-09 08:29:56,807 INFO L786 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 [2021-11-09 08:29:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-09 08:29:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2021-11-09 08:29:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.498220640569395) internal successors, (842), 562 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 842 transitions. [2021-11-09 08:29:56,903 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 842 transitions. Word has length 155 [2021-11-09 08:29:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:56,904 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 842 transitions. [2021-11-09 08:29:56,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:56,905 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 842 transitions. [2021-11-09 08:29:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-09 08:29:56,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:56,910 INFO L513 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] [2021-11-09 08:29:56,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:29:56,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash -599043347, now seen corresponding path program 1 times [2021-11-09 08:29:56,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:56,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662745519] [2021-11-09 08:29:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:56,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:57,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:57,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662745519] [2021-11-09 08:29:57,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662745519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:57,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:57,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:29:57,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792587154] [2021-11-09 08:29:57,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:29:57,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:29:57,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:29:57,305 INFO L87 Difference]: Start difference. First operand 563 states and 842 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:57,499 INFO L93 Difference]: Finished difference Result 1643 states and 2449 transitions. [2021-11-09 08:29:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:29:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-11-09 08:29:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:57,508 INFO L225 Difference]: With dead ends: 1643 [2021-11-09 08:29:57,508 INFO L226 Difference]: Without dead ends: 1089 [2021-11-09 08:29:57,514 INFO L786 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 [2021-11-09 08:29:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-09 08:29:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2021-11-09 08:29:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 1.4806629834254144) internal successors, (1608), 1086 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1608 transitions. [2021-11-09 08:29:57,594 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1608 transitions. Word has length 155 [2021-11-09 08:29:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:57,597 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1608 transitions. [2021-11-09 08:29:57,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1608 transitions. [2021-11-09 08:29:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-09 08:29:57,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:57,611 INFO L513 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] [2021-11-09 08:29:57,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:29:57,612 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:57,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1611010681, now seen corresponding path program 1 times [2021-11-09 08:29:57,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:57,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525280544] [2021-11-09 08:29:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:57,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:57,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:57,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525280544] [2021-11-09 08:29:57,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525280544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:57,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:57,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:29:57,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763093856] [2021-11-09 08:29:57,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:29:57,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:29:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:29:57,746 INFO L87 Difference]: Start difference. First operand 1087 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:57,870 INFO L93 Difference]: Finished difference Result 3223 states and 4762 transitions. [2021-11-09 08:29:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:29:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2021-11-09 08:29:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:57,885 INFO L225 Difference]: With dead ends: 3223 [2021-11-09 08:29:57,885 INFO L226 Difference]: Without dead ends: 2164 [2021-11-09 08:29:57,887 INFO L786 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 [2021-11-09 08:29:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-11-09 08:29:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1089. [2021-11-09 08:29:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 1.4797794117647058) internal successors, (1610), 1088 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1610 transitions. [2021-11-09 08:29:57,966 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1610 transitions. Word has length 156 [2021-11-09 08:29:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:57,967 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1610 transitions. [2021-11-09 08:29:57,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1610 transitions. [2021-11-09 08:29:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-09 08:29:57,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:57,971 INFO L513 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] [2021-11-09 08:29:57,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:29:57,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:57,972 INFO L85 PathProgramCache]: Analyzing trace with hash -580833396, now seen corresponding path program 1 times [2021-11-09 08:29:57,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:57,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023584992] [2021-11-09 08:29:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:57,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:58,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:58,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023584992] [2021-11-09 08:29:58,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023584992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:58,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:58,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:29:58,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551965525] [2021-11-09 08:29:58,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:29:58,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:29:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:29:58,198 INFO L87 Difference]: Start difference. First operand 1089 states and 1610 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:58,436 INFO L93 Difference]: Finished difference Result 3149 states and 4634 transitions. [2021-11-09 08:29:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:29:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-11-09 08:29:58,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:58,449 INFO L225 Difference]: With dead ends: 3149 [2021-11-09 08:29:58,450 INFO L226 Difference]: Without dead ends: 2090 [2021-11-09 08:29:58,453 INFO L786 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 [2021-11-09 08:29:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-09 08:29:58,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2021-11-09 08:29:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 1.460469573550551) internal successors, (3048), 2087 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3048 transitions. [2021-11-09 08:29:58,595 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3048 transitions. Word has length 157 [2021-11-09 08:29:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:58,596 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 3048 transitions. [2021-11-09 08:29:58,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3048 transitions. [2021-11-09 08:29:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-09 08:29:58,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:58,601 INFO L513 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] [2021-11-09 08:29:58,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:29:58,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:58,603 INFO L85 PathProgramCache]: Analyzing trace with hash 268848056, now seen corresponding path program 1 times [2021-11-09 08:29:58,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:58,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858771196] [2021-11-09 08:29:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:58,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:58,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:58,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858771196] [2021-11-09 08:29:58,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858771196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:58,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:58,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:29:58,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705243966] [2021-11-09 08:29:58,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:29:58,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:58,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:29:58,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:29:58,669 INFO L87 Difference]: Start difference. First operand 2088 states and 3048 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:58,922 INFO L93 Difference]: Finished difference Result 6188 states and 9024 transitions. [2021-11-09 08:29:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:29:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-11-09 08:29:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:58,948 INFO L225 Difference]: With dead ends: 6188 [2021-11-09 08:29:58,948 INFO L226 Difference]: Without dead ends: 4144 [2021-11-09 08:29:58,954 INFO L786 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 [2021-11-09 08:29:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-11-09 08:29:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 2092. [2021-11-09 08:29:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 1.459588713534194) internal successors, (3052), 2091 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3052 transitions. [2021-11-09 08:29:59,188 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3052 transitions. Word has length 158 [2021-11-09 08:29:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:59,189 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 3052 transitions. [2021-11-09 08:29:59,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3052 transitions. [2021-11-09 08:29:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-09 08:29:59,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:59,194 INFO L513 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] [2021-11-09 08:29:59,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:29:59,194 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:59,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:59,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1767168465, now seen corresponding path program 1 times [2021-11-09 08:29:59,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:59,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381459087] [2021-11-09 08:29:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:59,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:59,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:59,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381459087] [2021-11-09 08:29:59,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381459087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:59,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:59,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:29:59,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825019005] [2021-11-09 08:29:59,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:29:59,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:29:59,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:29:59,288 INFO L87 Difference]: Start difference. First operand 2092 states and 3052 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:59,591 INFO L93 Difference]: Finished difference Result 5411 states and 7901 transitions. [2021-11-09 08:29:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:29:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-09 08:29:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:59,617 INFO L225 Difference]: With dead ends: 5411 [2021-11-09 08:29:59,617 INFO L226 Difference]: Without dead ends: 3651 [2021-11-09 08:29:59,621 INFO L786 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 [2021-11-09 08:29:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-11-09 08:29:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3649. [2021-11-09 08:29:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.4372258771929824) internal successors, (5243), 3648 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5243 transitions. [2021-11-09 08:29:59,926 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5243 transitions. Word has length 159 [2021-11-09 08:29:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:59,926 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5243 transitions. [2021-11-09 08:29:59,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5243 transitions. [2021-11-09 08:29:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-09 08:29:59,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:59,934 INFO L513 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] [2021-11-09 08:29:59,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:29:59,934 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1188374862, now seen corresponding path program 1 times [2021-11-09 08:29:59,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:59,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011652174] [2021-11-09 08:29:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:59,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:00,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:00,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011652174] [2021-11-09 08:30:00,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011652174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:00,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:00,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:30:00,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359594280] [2021-11-09 08:30:00,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:00,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:00,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:00,069 INFO L87 Difference]: Start difference. First operand 3649 states and 5243 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:00,573 INFO L93 Difference]: Finished difference Result 10381 states and 14906 transitions. [2021-11-09 08:30:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:00,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-09 08:30:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:00,613 INFO L225 Difference]: With dead ends: 10381 [2021-11-09 08:30:00,613 INFO L226 Difference]: Without dead ends: 6769 [2021-11-09 08:30:00,619 INFO L786 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 [2021-11-09 08:30:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2021-11-09 08:30:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6767. [2021-11-09 08:30:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 1.4238841265149276) internal successors, (9634), 6766 states have internal predecessors, (9634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 9634 transitions. [2021-11-09 08:30:01,112 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 9634 transitions. Word has length 159 [2021-11-09 08:30:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:01,113 INFO L470 AbstractCegarLoop]: Abstraction has 6767 states and 9634 transitions. [2021-11-09 08:30:01,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 9634 transitions. [2021-11-09 08:30:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-09 08:30:01,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:01,124 INFO L513 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] [2021-11-09 08:30:01,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:30:01,125 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:01,125 INFO L85 PathProgramCache]: Analyzing trace with hash 504620971, now seen corresponding path program 1 times [2021-11-09 08:30:01,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:01,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823279846] [2021-11-09 08:30:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:01,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:01,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:01,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823279846] [2021-11-09 08:30:01,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823279846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:01,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:01,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:01,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702928068] [2021-11-09 08:30:01,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:01,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:01,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:01,284 INFO L87 Difference]: Start difference. First operand 6767 states and 9634 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:01,919 INFO L93 Difference]: Finished difference Result 13796 states and 19550 transitions. [2021-11-09 08:30:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-09 08:30:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:01,959 INFO L225 Difference]: With dead ends: 13796 [2021-11-09 08:30:01,959 INFO L226 Difference]: Without dead ends: 7146 [2021-11-09 08:30:01,968 INFO L786 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 [2021-11-09 08:30:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2021-11-09 08:30:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 6991. [2021-11-09 08:30:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 1.4143061516452073) internal successors, (9886), 6990 states have internal predecessors, (9886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 9886 transitions. [2021-11-09 08:30:02,536 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 9886 transitions. Word has length 159 [2021-11-09 08:30:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:02,536 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 9886 transitions. [2021-11-09 08:30:02,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 9886 transitions. [2021-11-09 08:30:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-09 08:30:02,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:02,549 INFO L513 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] [2021-11-09 08:30:02,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:30:02,549 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:02,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1391753097, now seen corresponding path program 1 times [2021-11-09 08:30:02,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:02,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617205691] [2021-11-09 08:30:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:02,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:02,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:02,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617205691] [2021-11-09 08:30:02,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617205691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:02,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:02,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:02,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915418062] [2021-11-09 08:30:02,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:02,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:02,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:02,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:02,596 INFO L87 Difference]: Start difference. First operand 6991 states and 9886 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:03,384 INFO L93 Difference]: Finished difference Result 20247 states and 28724 transitions. [2021-11-09 08:30:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-11-09 08:30:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:03,478 INFO L225 Difference]: With dead ends: 20247 [2021-11-09 08:30:03,478 INFO L226 Difference]: Without dead ends: 13857 [2021-11-09 08:30:03,490 INFO L786 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 [2021-11-09 08:30:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13857 states. [2021-11-09 08:30:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13857 to 7007. [2021-11-09 08:30:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 1.4133599771624321) internal successors, (9902), 7006 states have internal predecessors, (9902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 9902 transitions. [2021-11-09 08:30:04,229 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 9902 transitions. Word has length 160 [2021-11-09 08:30:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:04,229 INFO L470 AbstractCegarLoop]: Abstraction has 7007 states and 9902 transitions. [2021-11-09 08:30:04,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 9902 transitions. [2021-11-09 08:30:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-09 08:30:04,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:04,244 INFO L513 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] [2021-11-09 08:30:04,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:30:04,245 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:04,246 INFO L85 PathProgramCache]: Analyzing trace with hash -911721654, now seen corresponding path program 1 times [2021-11-09 08:30:04,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:04,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874261967] [2021-11-09 08:30:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:04,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:04,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:04,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874261967] [2021-11-09 08:30:04,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874261967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:04,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:04,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:04,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66299690] [2021-11-09 08:30:04,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:04,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:04,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:04,375 INFO L87 Difference]: Start difference. First operand 7007 states and 9902 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:04,933 INFO L93 Difference]: Finished difference Result 14004 states and 19790 transitions. [2021-11-09 08:30:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-11-09 08:30:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:04,953 INFO L225 Difference]: With dead ends: 14004 [2021-11-09 08:30:04,953 INFO L226 Difference]: Without dead ends: 7005 [2021-11-09 08:30:04,963 INFO L786 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 [2021-11-09 08:30:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2021-11-09 08:30:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 7005. [2021-11-09 08:30:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7005 states, 7004 states have (on average 1.4131924614505997) internal successors, (9898), 7004 states have internal predecessors, (9898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7005 states to 7005 states and 9898 transitions. [2021-11-09 08:30:05,494 INFO L78 Accepts]: Start accepts. Automaton has 7005 states and 9898 transitions. Word has length 161 [2021-11-09 08:30:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:05,495 INFO L470 AbstractCegarLoop]: Abstraction has 7005 states and 9898 transitions. [2021-11-09 08:30:05,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7005 states and 9898 transitions. [2021-11-09 08:30:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-09 08:30:05,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:05,508 INFO L513 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] [2021-11-09 08:30:05,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:30:05,509 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:05,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2124598414, now seen corresponding path program 1 times [2021-11-09 08:30:05,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:05,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409771494] [2021-11-09 08:30:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:05,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:05,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:05,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409771494] [2021-11-09 08:30:05,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409771494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:05,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:05,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:05,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064885297] [2021-11-09 08:30:05,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:05,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:05,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:05,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:05,598 INFO L87 Difference]: Start difference. First operand 7005 states and 9898 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:06,342 INFO L93 Difference]: Finished difference Result 16189 states and 22982 transitions. [2021-11-09 08:30:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-11-09 08:30:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:06,368 INFO L225 Difference]: With dead ends: 16189 [2021-11-09 08:30:06,368 INFO L226 Difference]: Without dead ends: 10395 [2021-11-09 08:30:06,378 INFO L786 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 [2021-11-09 08:30:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2021-11-09 08:30:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 10393. [2021-11-09 08:30:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10393 states, 10392 states have (on average 1.3914549653579678) internal successors, (14460), 10392 states have internal predecessors, (14460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 14460 transitions. [2021-11-09 08:30:07,198 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 14460 transitions. Word has length 161 [2021-11-09 08:30:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:07,199 INFO L470 AbstractCegarLoop]: Abstraction has 10393 states and 14460 transitions. [2021-11-09 08:30:07,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 14460 transitions. [2021-11-09 08:30:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-09 08:30:07,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:07,216 INFO L513 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] [2021-11-09 08:30:07,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:30:07,217 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash -727385235, now seen corresponding path program 1 times [2021-11-09 08:30:07,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:07,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939899526] [2021-11-09 08:30:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:07,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:07,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:07,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939899526] [2021-11-09 08:30:07,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939899526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:07,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:07,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:07,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296346995] [2021-11-09 08:30:07,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:07,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:07,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:07,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:07,280 INFO L87 Difference]: Start difference. First operand 10393 states and 14460 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:08,431 INFO L93 Difference]: Finished difference Result 24303 states and 34628 transitions. [2021-11-09 08:30:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2021-11-09 08:30:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:08,473 INFO L225 Difference]: With dead ends: 24303 [2021-11-09 08:30:08,474 INFO L226 Difference]: Without dead ends: 15108 [2021-11-09 08:30:08,491 INFO L786 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 [2021-11-09 08:30:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2021-11-09 08:30:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 13181. [2021-11-09 08:30:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13181 states, 13180 states have (on average 1.4350531107738997) internal successors, (18914), 13180 states have internal predecessors, (18914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13181 states to 13181 states and 18914 transitions. [2021-11-09 08:30:09,771 INFO L78 Accepts]: Start accepts. Automaton has 13181 states and 18914 transitions. Word has length 163 [2021-11-09 08:30:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:09,771 INFO L470 AbstractCegarLoop]: Abstraction has 13181 states and 18914 transitions. [2021-11-09 08:30:09,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 13181 states and 18914 transitions. [2021-11-09 08:30:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-09 08:30:09,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:09,789 INFO L513 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] [2021-11-09 08:30:09,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:30:09,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:09,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1248523357, now seen corresponding path program 1 times [2021-11-09 08:30:09,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:09,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432973818] [2021-11-09 08:30:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:09,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:09,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:09,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432973818] [2021-11-09 08:30:09,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432973818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:09,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:09,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:09,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9334430] [2021-11-09 08:30:09,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:09,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:09,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:09,855 INFO L87 Difference]: Start difference. First operand 13181 states and 18914 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:10,859 INFO L93 Difference]: Finished difference Result 29139 states and 42714 transitions. [2021-11-09 08:30:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:10,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2021-11-09 08:30:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:10,901 INFO L225 Difference]: With dead ends: 29139 [2021-11-09 08:30:10,902 INFO L226 Difference]: Without dead ends: 19243 [2021-11-09 08:30:10,916 INFO L786 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 [2021-11-09 08:30:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19243 states. [2021-11-09 08:30:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19243 to 17437. [2021-11-09 08:30:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17437 states, 17436 states have (on average 1.4709795824730443) internal successors, (25648), 17436 states have internal predecessors, (25648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25648 transitions. [2021-11-09 08:30:12,379 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25648 transitions. Word has length 165 [2021-11-09 08:30:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:12,379 INFO L470 AbstractCegarLoop]: Abstraction has 17437 states and 25648 transitions. [2021-11-09 08:30:12,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25648 transitions. [2021-11-09 08:30:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 08:30:12,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:12,397 INFO L513 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] [2021-11-09 08:30:12,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:30:12,398 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash -846552929, now seen corresponding path program 1 times [2021-11-09 08:30:12,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:12,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023309364] [2021-11-09 08:30:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:12,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:12,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:12,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023309364] [2021-11-09 08:30:12,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023309364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:12,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:12,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:12,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829892565] [2021-11-09 08:30:12,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:12,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:12,498 INFO L87 Difference]: Start difference. First operand 17437 states and 25648 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:13,899 INFO L93 Difference]: Finished difference Result 33724 states and 49986 transitions. [2021-11-09 08:30:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:30:13,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-09 08:30:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:13,944 INFO L225 Difference]: With dead ends: 33724 [2021-11-09 08:30:13,944 INFO L226 Difference]: Without dead ends: 17437 [2021-11-09 08:30:13,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2021-11-09 08:30:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 17437. [2021-11-09 08:30:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17437 states, 17436 states have (on average 1.4573296627666896) internal successors, (25410), 17436 states have internal predecessors, (25410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25410 transitions. [2021-11-09 08:30:15,363 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25410 transitions. Word has length 166 [2021-11-09 08:30:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:15,363 INFO L470 AbstractCegarLoop]: Abstraction has 17437 states and 25410 transitions. [2021-11-09 08:30:15,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25410 transitions. [2021-11-09 08:30:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 08:30:15,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:15,391 INFO L513 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] [2021-11-09 08:30:15,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:30:15,392 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash -316024710, now seen corresponding path program 1 times [2021-11-09 08:30:15,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:15,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681598591] [2021-11-09 08:30:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:15,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:15,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:15,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681598591] [2021-11-09 08:30:15,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681598591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:15,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:15,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:15,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449283572] [2021-11-09 08:30:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:15,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:15,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:15,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:15,576 INFO L87 Difference]: Start difference. First operand 17437 states and 25410 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:17,510 INFO L93 Difference]: Finished difference Result 43679 states and 65710 transitions. [2021-11-09 08:30:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:17,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-09 08:30:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:17,576 INFO L225 Difference]: With dead ends: 43679 [2021-11-09 08:30:17,577 INFO L226 Difference]: Without dead ends: 32388 [2021-11-09 08:30:17,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32388 states. [2021-11-09 08:30:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32388 to 32386. [2021-11-09 08:30:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32386 states, 32385 states have (on average 1.4722556739231125) internal successors, (47679), 32385 states have internal predecessors, (47679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32386 states to 32386 states and 47679 transitions. [2021-11-09 08:30:19,941 INFO L78 Accepts]: Start accepts. Automaton has 32386 states and 47679 transitions. Word has length 166 [2021-11-09 08:30:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:19,941 INFO L470 AbstractCegarLoop]: Abstraction has 32386 states and 47679 transitions. [2021-11-09 08:30:19,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 32386 states and 47679 transitions. [2021-11-09 08:30:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 08:30:19,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:19,965 INFO L513 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] [2021-11-09 08:30:19,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:30:19,966 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash 105363050, now seen corresponding path program 1 times [2021-11-09 08:30:19,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:19,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16661503] [2021-11-09 08:30:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:19,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:20,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:20,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16661503] [2021-11-09 08:30:20,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16661503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:20,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:20,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:20,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313464221] [2021-11-09 08:30:20,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:20,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:20,100 INFO L87 Difference]: Start difference. First operand 32386 states and 47679 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:23,996 INFO L93 Difference]: Finished difference Result 83811 states and 123599 transitions. [2021-11-09 08:30:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:23,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-09 08:30:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:24,099 INFO L225 Difference]: With dead ends: 83811 [2021-11-09 08:30:24,099 INFO L226 Difference]: Without dead ends: 51773 [2021-11-09 08:30:24,134 INFO L786 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 [2021-11-09 08:30:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51773 states. [2021-11-09 08:30:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51773 to 51771. [2021-11-09 08:30:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51771 states, 51770 states have (on average 1.4583349430171915) internal successors, (75498), 51770 states have internal predecessors, (75498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51771 states to 51771 states and 75498 transitions. [2021-11-09 08:30:28,318 INFO L78 Accepts]: Start accepts. Automaton has 51771 states and 75498 transitions. Word has length 166 [2021-11-09 08:30:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:28,319 INFO L470 AbstractCegarLoop]: Abstraction has 51771 states and 75498 transitions. [2021-11-09 08:30:28,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 51771 states and 75498 transitions. [2021-11-09 08:30:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-09 08:30:28,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:28,345 INFO L513 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] [2021-11-09 08:30:28,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:30:28,346 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:28,346 INFO L85 PathProgramCache]: Analyzing trace with hash 781133202, now seen corresponding path program 1 times [2021-11-09 08:30:28,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:28,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781900571] [2021-11-09 08:30:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:28,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:28,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:28,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781900571] [2021-11-09 08:30:28,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781900571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:28,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:28,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:28,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461100912] [2021-11-09 08:30:28,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:28,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:28,489 INFO L87 Difference]: Start difference. First operand 51771 states and 75498 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:31,598 INFO L93 Difference]: Finished difference Result 82457 states and 120204 transitions. [2021-11-09 08:30:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2021-11-09 08:30:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:31,663 INFO L225 Difference]: With dead ends: 82457 [2021-11-09 08:30:31,664 INFO L226 Difference]: Without dead ends: 42355 [2021-11-09 08:30:31,692 INFO L786 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 [2021-11-09 08:30:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42355 states. [2021-11-09 08:30:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42355 to 42355. [2021-11-09 08:30:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42355 states, 42354 states have (on average 1.4537233791377437) internal successors, (61571), 42354 states have internal predecessors, (61571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42355 states to 42355 states and 61571 transitions. [2021-11-09 08:30:35,146 INFO L78 Accepts]: Start accepts. Automaton has 42355 states and 61571 transitions. Word has length 168 [2021-11-09 08:30:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:35,146 INFO L470 AbstractCegarLoop]: Abstraction has 42355 states and 61571 transitions. [2021-11-09 08:30:35,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 42355 states and 61571 transitions. [2021-11-09 08:30:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-09 08:30:35,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:35,169 INFO L513 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] [2021-11-09 08:30:35,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:30:35,170 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash 227102220, now seen corresponding path program 1 times [2021-11-09 08:30:35,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:35,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947778690] [2021-11-09 08:30:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:35,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:35,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:35,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947778690] [2021-11-09 08:30:35,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947778690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:35,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:35,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:35,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707391198] [2021-11-09 08:30:35,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:35,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:35,248 INFO L87 Difference]: Start difference. First operand 42355 states and 61571 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:40,062 INFO L93 Difference]: Finished difference Result 101038 states and 148810 transitions. [2021-11-09 08:30:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2021-11-09 08:30:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:40,179 INFO L225 Difference]: With dead ends: 101038 [2021-11-09 08:30:40,179 INFO L226 Difference]: Without dead ends: 66401 [2021-11-09 08:30:40,218 INFO L786 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 [2021-11-09 08:30:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66401 states.