./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 65159196aa732cf84d788dcb31500c216d665703806e14a7c6f7047ab62d591b --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:17:31,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:17:31,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:17:31,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:17:31,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:17:31,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:17:31,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:17:31,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:17:31,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:17:31,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:17:31,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:17:31,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:17:31,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:17:31,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:17:31,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:17:31,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:17:31,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:17:31,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:17:31,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:17:31,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:17:31,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:17:31,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:17:31,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:17:31,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:17:31,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:17:31,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:17:31,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:17:31,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:17:31,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:17:31,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:17:31,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:17:31,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:17:31,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:17:31,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:17:31,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:17:31,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:17:31,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:17:31,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:17:31,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:17:31,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:17:31,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:17:31,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:17:31,987 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:17:31,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:17:31,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:17:31,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:17:31,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:17:31,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:17:31,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:17:31,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:17:31,992 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:17:31,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:17:31,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:17:31,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:17:31,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:17:31,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:17:31,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:17:31,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:17:31,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:17:31,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:17:31,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:17:31,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:17:31,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:17:31,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:17:31,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:17:31,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:17:31,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:17:31,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:17:31,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:17:31,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:17:31,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:17:31,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:17:31,997 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:17:31,997 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:17:31,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:17:31,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:17:31,997 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65159196aa732cf84d788dcb31500c216d665703806e14a7c6f7047ab62d591b [2021-12-15 11:17:32,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:17:32,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:17:32,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:17:32,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:17:32,239 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:17:32,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2021-12-15 11:17:32,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab83964b4/7b26d6f7571e4c469e12f9d80222088f/FLAG98ed428b6 [2021-12-15 11:17:32,670 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:17:32,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2021-12-15 11:17:32,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab83964b4/7b26d6f7571e4c469e12f9d80222088f/FLAG98ed428b6 [2021-12-15 11:17:33,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab83964b4/7b26d6f7571e4c469e12f9d80222088f [2021-12-15 11:17:33,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:17:33,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:17:33,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:17:33,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:17:33,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:17:33,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa07f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33, skipping insertion in model container [2021-12-15 11:17:33,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:17:33,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:17:33,338 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c[15075,15088] [2021-12-15 11:17:33,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:17:33,347 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:17:33,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c[15075,15088] [2021-12-15 11:17:33,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:17:33,399 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:17:33,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33 WrapperNode [2021-12-15 11:17:33,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:17:33,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:17:33,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:17:33,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:17:33,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,440 INFO L137 Inliner]: procedures = 25, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 392 [2021-12-15 11:17:33,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:17:33,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:17:33,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:17:33,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:17:33,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:17:33,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:17:33,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:17:33,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:17:33,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (1/1) ... [2021-12-15 11:17:33,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:17:33,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:17:33,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:17:33,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:17:33,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:17:33,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:17:33,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:17:33,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:17:33,681 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:17:33,682 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:17:34,065 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:17:34,078 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:17:34,078 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:17:34,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:17:34 BoogieIcfgContainer [2021-12-15 11:17:34,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:17:34,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:17:34,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:17:34,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:17:34,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:17:33" (1/3) ... [2021-12-15 11:17:34,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732d427c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:17:34, skipping insertion in model container [2021-12-15 11:17:34,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:17:33" (2/3) ... [2021-12-15 11:17:34,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732d427c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:17:34, skipping insertion in model container [2021-12-15 11:17:34,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:17:34" (3/3) ... [2021-12-15 11:17:34,092 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c [2021-12-15 11:17:34,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:17:34,105 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:17:34,143 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:17:34,150 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:17:34,150 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:17:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 1.7407407407407407) internal successors, (188), 109 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:17:34,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:34,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:34,190 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:34,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:34,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1259035486, now seen corresponding path program 1 times [2021-12-15 11:17:34,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:34,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559173821] [2021-12-15 11:17:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:34,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:34,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559173821] [2021-12-15 11:17:34,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559173821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:34,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:34,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:17:34,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539380072] [2021-12-15 11:17:34,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:34,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:17:34,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:34,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:17:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:17:34,427 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 1.7407407407407407) internal successors, (188), 109 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:34,468 INFO L93 Difference]: Finished difference Result 175 states and 290 transitions. [2021-12-15 11:17:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:17:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 11:17:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:34,479 INFO L225 Difference]: With dead ends: 175 [2021-12-15 11:17:34,479 INFO L226 Difference]: Without dead ends: 106 [2021-12-15 11:17:34,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:17:34,486 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:34,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-15 11:17:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-15 11:17:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.723809523809524) internal successors, (181), 105 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 181 transitions. [2021-12-15 11:17:34,519 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 181 transitions. Word has length 37 [2021-12-15 11:17:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:34,519 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 181 transitions. [2021-12-15 11:17:34,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 181 transitions. [2021-12-15 11:17:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:17:34,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:34,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:34,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:17:34,522 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:34,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1533795100, now seen corresponding path program 1 times [2021-12-15 11:17:34,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140902426] [2021-12-15 11:17:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:34,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:34,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:34,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140902426] [2021-12-15 11:17:34,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140902426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:34,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:34,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:17:34,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901002121] [2021-12-15 11:17:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:34,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:17:34,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:17:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:17:34,626 INFO L87 Difference]: Start difference. First operand 106 states and 181 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:34,716 INFO L93 Difference]: Finished difference Result 170 states and 280 transitions. [2021-12-15 11:17:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:17:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 11:17:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:34,719 INFO L225 Difference]: With dead ends: 170 [2021-12-15 11:17:34,720 INFO L226 Difference]: Without dead ends: 106 [2021-12-15 11:17:34,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:17:34,723 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 3 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:34,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 673 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:17:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-15 11:17:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-15 11:17:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 105 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-12-15 11:17:34,741 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 37 [2021-12-15 11:17:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:34,742 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-15 11:17:34,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2021-12-15 11:17:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:17:34,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:34,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:34,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:17:34,748 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:34,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:34,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1950823117, now seen corresponding path program 1 times [2021-12-15 11:17:34,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462024391] [2021-12-15 11:17:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:34,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:34,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462024391] [2021-12-15 11:17:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462024391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:34,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:34,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:17:34,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159567424] [2021-12-15 11:17:34,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:34,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:17:34,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:17:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:34,908 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:34,934 INFO L93 Difference]: Finished difference Result 220 states and 321 transitions. [2021-12-15 11:17:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:17:34,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-15 11:17:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:34,937 INFO L225 Difference]: With dead ends: 220 [2021-12-15 11:17:34,937 INFO L226 Difference]: Without dead ends: 160 [2021-12-15 11:17:34,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:34,939 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 85 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:34,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 315 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-15 11:17:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-12-15 11:17:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.4267515923566878) internal successors, (224), 157 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 224 transitions. [2021-12-15 11:17:34,959 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 224 transitions. Word has length 76 [2021-12-15 11:17:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:34,959 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 224 transitions. [2021-12-15 11:17:34,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:34,960 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 224 transitions. [2021-12-15 11:17:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:17:34,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:34,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:34,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:17:34,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:34,963 INFO L85 PathProgramCache]: Analyzing trace with hash 699917825, now seen corresponding path program 1 times [2021-12-15 11:17:34,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:34,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746001160] [2021-12-15 11:17:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:34,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:35,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746001160] [2021-12-15 11:17:35,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746001160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:35,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:35,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:17:35,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695630769] [2021-12-15 11:17:35,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:35,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:17:35,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:35,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:17:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:35,087 INFO L87 Difference]: Start difference. First operand 158 states and 224 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:35,109 INFO L93 Difference]: Finished difference Result 370 states and 560 transitions. [2021-12-15 11:17:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:17:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-15 11:17:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:35,112 INFO L225 Difference]: With dead ends: 370 [2021-12-15 11:17:35,114 INFO L226 Difference]: Without dead ends: 258 [2021-12-15 11:17:35,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:35,116 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 81 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:35,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 314 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-15 11:17:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2021-12-15 11:17:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4862745098039216) internal successors, (379), 255 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 379 transitions. [2021-12-15 11:17:35,133 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 379 transitions. Word has length 76 [2021-12-15 11:17:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:35,134 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 379 transitions. [2021-12-15 11:17:35,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 379 transitions. [2021-12-15 11:17:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:17:35,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:35,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:35,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:17:35,143 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:35,144 INFO L85 PathProgramCache]: Analyzing trace with hash -45664905, now seen corresponding path program 1 times [2021-12-15 11:17:35,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:35,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336546306] [2021-12-15 11:17:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:35,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:35,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336546306] [2021-12-15 11:17:35,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336546306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:35,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:35,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:17:35,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757751352] [2021-12-15 11:17:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:35,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:17:35,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:17:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:35,237 INFO L87 Difference]: Start difference. First operand 256 states and 379 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:35,276 INFO L93 Difference]: Finished difference Result 652 states and 1005 transitions. [2021-12-15 11:17:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:17:35,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-15 11:17:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:35,283 INFO L225 Difference]: With dead ends: 652 [2021-12-15 11:17:35,283 INFO L226 Difference]: Without dead ends: 442 [2021-12-15 11:17:35,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:35,287 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 77 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:35,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 313 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-15 11:17:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2021-12-15 11:17:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5193621867881548) internal successors, (667), 439 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 667 transitions. [2021-12-15 11:17:35,330 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 667 transitions. Word has length 76 [2021-12-15 11:17:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:35,331 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 667 transitions. [2021-12-15 11:17:35,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 667 transitions. [2021-12-15 11:17:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:17:35,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:35,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:35,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:17:35,333 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1985695763, now seen corresponding path program 1 times [2021-12-15 11:17:35,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:35,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904799292] [2021-12-15 11:17:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:35,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:35,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:35,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904799292] [2021-12-15 11:17:35,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904799292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:35,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:35,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:17:35,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911911196] [2021-12-15 11:17:35,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:35,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:17:35,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:17:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:35,415 INFO L87 Difference]: Start difference. First operand 440 states and 667 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:35,454 INFO L93 Difference]: Finished difference Result 1180 states and 1829 transitions. [2021-12-15 11:17:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:17:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-15 11:17:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:35,459 INFO L225 Difference]: With dead ends: 1180 [2021-12-15 11:17:35,459 INFO L226 Difference]: Without dead ends: 786 [2021-12-15 11:17:35,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:35,464 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 73 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:35,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-12-15 11:17:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 784. [2021-12-15 11:17:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.5312899106002553) internal successors, (1199), 783 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1199 transitions. [2021-12-15 11:17:35,501 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1199 transitions. Word has length 76 [2021-12-15 11:17:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:35,501 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1199 transitions. [2021-12-15 11:17:35,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1199 transitions. [2021-12-15 11:17:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:17:35,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:35,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:35,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:17:35,506 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash 714986851, now seen corresponding path program 1 times [2021-12-15 11:17:35,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:35,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304294247] [2021-12-15 11:17:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:35,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:35,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304294247] [2021-12-15 11:17:35,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304294247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:35,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:35,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:17:35,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577144630] [2021-12-15 11:17:35,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:35,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:17:35,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:17:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:17:35,628 INFO L87 Difference]: Start difference. First operand 784 states and 1199 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:36,049 INFO L93 Difference]: Finished difference Result 9640 states and 15035 transitions. [2021-12-15 11:17:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 11:17:36,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-15 11:17:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:36,085 INFO L225 Difference]: With dead ends: 9640 [2021-12-15 11:17:36,085 INFO L226 Difference]: Without dead ends: 8902 [2021-12-15 11:17:36,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-15 11:17:36,090 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 2232 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2232 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:36,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2232 Valid, 1240 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:17:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2021-12-15 11:17:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 1520. [2021-12-15 11:17:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 1.5266622778143515) internal successors, (2319), 1519 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2319 transitions. [2021-12-15 11:17:36,232 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2319 transitions. Word has length 76 [2021-12-15 11:17:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:36,233 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 2319 transitions. [2021-12-15 11:17:36,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2319 transitions. [2021-12-15 11:17:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 11:17:36,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:36,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:36,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:17:36,235 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1508096525, now seen corresponding path program 1 times [2021-12-15 11:17:36,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:36,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530743663] [2021-12-15 11:17:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:36,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:36,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530743663] [2021-12-15 11:17:36,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530743663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:36,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:36,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:17:36,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618660160] [2021-12-15 11:17:36,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:36,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:17:36,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:17:36,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:36,300 INFO L87 Difference]: Start difference. First operand 1520 states and 2319 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:36,400 INFO L93 Difference]: Finished difference Result 3694 states and 5667 transitions. [2021-12-15 11:17:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:17:36,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-15 11:17:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:36,415 INFO L225 Difference]: With dead ends: 3694 [2021-12-15 11:17:36,415 INFO L226 Difference]: Without dead ends: 2220 [2021-12-15 11:17:36,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:36,418 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 57 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:36,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 252 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-12-15 11:17:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2218. [2021-12-15 11:17:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.5196211096075778) internal successors, (3369), 2217 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3369 transitions. [2021-12-15 11:17:36,504 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3369 transitions. Word has length 78 [2021-12-15 11:17:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:36,505 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 3369 transitions. [2021-12-15 11:17:36,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3369 transitions. [2021-12-15 11:17:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 11:17:36,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:36,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:36,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:17:36,506 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:36,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1441603013, now seen corresponding path program 1 times [2021-12-15 11:17:36,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:36,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374663647] [2021-12-15 11:17:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:36,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:36,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:36,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374663647] [2021-12-15 11:17:36,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374663647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:36,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:36,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:17:36,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423504279] [2021-12-15 11:17:36,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:36,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:17:36,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:36,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:17:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:17:36,732 INFO L87 Difference]: Start difference. First operand 2218 states and 3369 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:36,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:36,998 INFO L93 Difference]: Finished difference Result 4390 states and 6691 transitions. [2021-12-15 11:17:36,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 11:17:36,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-15 11:17:36,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:37,006 INFO L225 Difference]: With dead ends: 4390 [2021-12-15 11:17:37,006 INFO L226 Difference]: Without dead ends: 2220 [2021-12-15 11:17:37,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-15 11:17:37,010 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 639 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:37,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 632 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:17:37,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-12-15 11:17:37,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2218. [2021-12-15 11:17:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.5087956698240865) internal successors, (3345), 2217 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3345 transitions. [2021-12-15 11:17:37,106 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3345 transitions. Word has length 78 [2021-12-15 11:17:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:37,106 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 3345 transitions. [2021-12-15 11:17:37,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3345 transitions. [2021-12-15 11:17:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 11:17:37,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:37,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:37,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:17:37,108 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash 347311063, now seen corresponding path program 1 times [2021-12-15 11:17:37,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:37,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156830733] [2021-12-15 11:17:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:37,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:37,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:37,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156830733] [2021-12-15 11:17:37,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156830733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:37,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:37,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:17:37,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311335157] [2021-12-15 11:17:37,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:37,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:17:37,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:37,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:17:37,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:37,148 INFO L87 Difference]: Start difference. First operand 2218 states and 3345 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:37,297 INFO L93 Difference]: Finished difference Result 6270 states and 9459 transitions. [2021-12-15 11:17:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:17:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-15 11:17:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:37,311 INFO L225 Difference]: With dead ends: 6270 [2021-12-15 11:17:37,311 INFO L226 Difference]: Without dead ends: 4100 [2021-12-15 11:17:37,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:37,315 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 65 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:37,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 302 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-12-15 11:17:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 4098. [2021-12-15 11:17:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.4920673663656334) internal successors, (6113), 4097 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 6113 transitions. [2021-12-15 11:17:37,517 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 6113 transitions. Word has length 78 [2021-12-15 11:17:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:37,517 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 6113 transitions. [2021-12-15 11:17:37,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:37,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 6113 transitions. [2021-12-15 11:17:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 11:17:37,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:37,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:37,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:17:37,519 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1594818679, now seen corresponding path program 1 times [2021-12-15 11:17:37,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955569740] [2021-12-15 11:17:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:37,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:37,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955569740] [2021-12-15 11:17:37,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955569740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:37,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:37,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:17:37,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312302702] [2021-12-15 11:17:37,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:37,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:17:37,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:37,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:17:37,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:37,558 INFO L87 Difference]: Start difference. First operand 4098 states and 6113 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:37,852 INFO L93 Difference]: Finished difference Result 11622 states and 17283 transitions. [2021-12-15 11:17:37,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:17:37,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-15 11:17:37,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:37,879 INFO L225 Difference]: With dead ends: 11622 [2021-12-15 11:17:37,879 INFO L226 Difference]: Without dead ends: 7572 [2021-12-15 11:17:37,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:37,886 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 69 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:37,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 311 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7572 states. [2021-12-15 11:17:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7572 to 7570. [2021-12-15 11:17:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 1.4692826000792707) internal successors, (11121), 7569 states have internal predecessors, (11121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 11121 transitions. [2021-12-15 11:17:38,259 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 11121 transitions. Word has length 78 [2021-12-15 11:17:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:38,259 INFO L470 AbstractCegarLoop]: Abstraction has 7570 states and 11121 transitions. [2021-12-15 11:17:38,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 11121 transitions. [2021-12-15 11:17:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 11:17:38,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:38,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:38,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:17:38,263 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2140223893, now seen corresponding path program 1 times [2021-12-15 11:17:38,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:38,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265044532] [2021-12-15 11:17:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:38,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:38,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:38,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265044532] [2021-12-15 11:17:38,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265044532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:38,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:38,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:17:38,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515144229] [2021-12-15 11:17:38,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:38,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:17:38,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:17:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:17:38,340 INFO L87 Difference]: Start difference. First operand 7570 states and 11121 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:38,751 INFO L93 Difference]: Finished difference Result 15092 states and 22194 transitions. [2021-12-15 11:17:38,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:17:38,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-15 11:17:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:38,771 INFO L225 Difference]: With dead ends: 15092 [2021-12-15 11:17:38,771 INFO L226 Difference]: Without dead ends: 7570 [2021-12-15 11:17:38,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:17:38,782 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 573 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:38,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 176 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:17:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7570 states. [2021-12-15 11:17:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7570 to 7570. [2021-12-15 11:17:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 1.4523715153917294) internal successors, (10993), 7569 states have internal predecessors, (10993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 10993 transitions. [2021-12-15 11:17:39,149 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 10993 transitions. Word has length 79 [2021-12-15 11:17:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:39,150 INFO L470 AbstractCegarLoop]: Abstraction has 7570 states and 10993 transitions. [2021-12-15 11:17:39,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 10993 transitions. [2021-12-15 11:17:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 11:17:39,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:39,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:39,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:17:39,152 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1438624019, now seen corresponding path program 1 times [2021-12-15 11:17:39,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:39,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570022408] [2021-12-15 11:17:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:39,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:39,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570022408] [2021-12-15 11:17:39,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570022408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:39,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:39,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:17:39,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724854428] [2021-12-15 11:17:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:39,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:17:39,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:39,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:17:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:17:39,238 INFO L87 Difference]: Start difference. First operand 7570 states and 10993 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:39,959 INFO L93 Difference]: Finished difference Result 14033 states and 20199 transitions. [2021-12-15 11:17:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:17:39,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-15 11:17:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:39,989 INFO L225 Difference]: With dead ends: 14033 [2021-12-15 11:17:39,990 INFO L226 Difference]: Without dead ends: 14031 [2021-12-15 11:17:39,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:17:39,997 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 724 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:39,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 695 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14031 states. [2021-12-15 11:17:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14031 to 7954. [2021-12-15 11:17:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 1.4265057211115302) internal successors, (11345), 7953 states have internal predecessors, (11345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 11345 transitions. [2021-12-15 11:17:40,486 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 11345 transitions. Word has length 79 [2021-12-15 11:17:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:40,487 INFO L470 AbstractCegarLoop]: Abstraction has 7954 states and 11345 transitions. [2021-12-15 11:17:40,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 11345 transitions. [2021-12-15 11:17:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 11:17:40,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:40,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:40,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:17:40,493 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1530216785, now seen corresponding path program 1 times [2021-12-15 11:17:40,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:40,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184856803] [2021-12-15 11:17:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:40,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 11:17:40,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:40,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184856803] [2021-12-15 11:17:40,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184856803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:40,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:40,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:17:40,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744852296] [2021-12-15 11:17:40,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:40,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:17:40,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:17:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:17:40,584 INFO L87 Difference]: Start difference. First operand 7954 states and 11345 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:42,428 INFO L93 Difference]: Finished difference Result 56960 states and 81288 transitions. [2021-12-15 11:17:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 11:17:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 11:17:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:42,541 INFO L225 Difference]: With dead ends: 56960 [2021-12-15 11:17:42,541 INFO L226 Difference]: Without dead ends: 49054 [2021-12-15 11:17:42,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:17:42,573 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1397 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1397 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:42,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1397 Valid, 915 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:17:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49054 states. [2021-12-15 11:17:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49054 to 15858. [2021-12-15 11:17:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15858 states, 15857 states have (on average 1.421769565491581) internal successors, (22545), 15857 states have internal predecessors, (22545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15858 states to 15858 states and 22545 transitions. [2021-12-15 11:17:43,767 INFO L78 Accepts]: Start accepts. Automaton has 15858 states and 22545 transitions. Word has length 111 [2021-12-15 11:17:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:43,768 INFO L470 AbstractCegarLoop]: Abstraction has 15858 states and 22545 transitions. [2021-12-15 11:17:43,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 15858 states and 22545 transitions. [2021-12-15 11:17:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 11:17:43,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:43,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:43,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:17:43,776 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:43,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1517242895, now seen corresponding path program 1 times [2021-12-15 11:17:43,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:43,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680365869] [2021-12-15 11:17:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:43,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 11:17:43,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680365869] [2021-12-15 11:17:43,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680365869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:43,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:43,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:17:43,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323624431] [2021-12-15 11:17:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:43,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:17:43,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:17:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:17:43,864 INFO L87 Difference]: Start difference. First operand 15858 states and 22545 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:45,658 INFO L93 Difference]: Finished difference Result 64864 states and 92488 transitions. [2021-12-15 11:17:45,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 11:17:45,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 11:17:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:45,769 INFO L225 Difference]: With dead ends: 64864 [2021-12-15 11:17:45,769 INFO L226 Difference]: Without dead ends: 56958 [2021-12-15 11:17:45,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:17:45,806 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1225 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:45,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 975 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:17:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56958 states. [2021-12-15 11:17:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56958 to 27730. [2021-12-15 11:17:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27730 states, 27729 states have (on average 1.416026542608821) internal successors, (39265), 27729 states have internal predecessors, (39265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39265 transitions. [2021-12-15 11:17:47,533 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39265 transitions. Word has length 111 [2021-12-15 11:17:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:47,534 INFO L470 AbstractCegarLoop]: Abstraction has 27730 states and 39265 transitions. [2021-12-15 11:17:47,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39265 transitions. [2021-12-15 11:17:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 11:17:47,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:47,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:47,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:17:47,544 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -47809913, now seen corresponding path program 1 times [2021-12-15 11:17:47,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:47,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600518723] [2021-12-15 11:17:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:47,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 11:17:47,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600518723] [2021-12-15 11:17:47,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600518723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:47,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:47,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:17:47,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921801800] [2021-12-15 11:17:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:47,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:17:47,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:47,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:17:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:17:47,630 INFO L87 Difference]: Start difference. First operand 27730 states and 39265 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:50,108 INFO L93 Difference]: Finished difference Result 72768 states and 103688 transitions. [2021-12-15 11:17:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 11:17:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 11:17:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:50,221 INFO L225 Difference]: With dead ends: 72768 [2021-12-15 11:17:50,222 INFO L226 Difference]: Without dead ends: 64862 [2021-12-15 11:17:50,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:17:50,257 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1195 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:50,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 1033 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:17:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64862 states. [2021-12-15 11:17:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64862 to 35634. [2021-12-15 11:17:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35634 states, 35633 states have (on average 1.416243369909915) internal successors, (50465), 35633 states have internal predecessors, (50465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35634 states to 35634 states and 50465 transitions. [2021-12-15 11:17:52,216 INFO L78 Accepts]: Start accepts. Automaton has 35634 states and 50465 transitions. Word has length 111 [2021-12-15 11:17:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:52,217 INFO L470 AbstractCegarLoop]: Abstraction has 35634 states and 50465 transitions. [2021-12-15 11:17:52,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 35634 states and 50465 transitions. [2021-12-15 11:17:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 11:17:52,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:52,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:52,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:17:52,227 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1283268953, now seen corresponding path program 1 times [2021-12-15 11:17:52,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:52,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318879926] [2021-12-15 11:17:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:52,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 11:17:52,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318879926] [2021-12-15 11:17:52,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318879926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:52,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:52,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:17:52,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752885757] [2021-12-15 11:17:52,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:52,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:17:52,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:17:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:17:52,313 INFO L87 Difference]: Start difference. First operand 35634 states and 50465 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:55,481 INFO L93 Difference]: Finished difference Result 80672 states and 114888 transitions. [2021-12-15 11:17:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 11:17:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 11:17:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:55,594 INFO L225 Difference]: With dead ends: 80672 [2021-12-15 11:17:55,595 INFO L226 Difference]: Without dead ends: 72766 [2021-12-15 11:17:55,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:17:55,626 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1265 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:55,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1265 Valid, 1048 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 11:17:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72766 states. [2021-12-15 11:17:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72766 to 43538. [2021-12-15 11:17:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43538 states, 43537 states have (on average 1.4163814686358729) internal successors, (61665), 43537 states have internal predecessors, (61665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43538 states to 43538 states and 61665 transitions. [2021-12-15 11:17:57,787 INFO L78 Accepts]: Start accepts. Automaton has 43538 states and 61665 transitions. Word has length 111 [2021-12-15 11:17:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:57,787 INFO L470 AbstractCegarLoop]: Abstraction has 43538 states and 61665 transitions. [2021-12-15 11:17:57,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 43538 states and 61665 transitions. [2021-12-15 11:17:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 11:17:57,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:57,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:57,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:17:57,799 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1590702791, now seen corresponding path program 1 times [2021-12-15 11:17:57,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:57,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127849723] [2021-12-15 11:17:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:57,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 11:17:57,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:57,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127849723] [2021-12-15 11:17:57,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127849723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:57,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:57,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:17:57,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348460524] [2021-12-15 11:17:57,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:57,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:17:57,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:17:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:17:57,880 INFO L87 Difference]: Start difference. First operand 43538 states and 61665 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:01,672 INFO L93 Difference]: Finished difference Result 88576 states and 126088 transitions. [2021-12-15 11:18:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 11:18:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 11:18:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:01,790 INFO L225 Difference]: With dead ends: 88576 [2021-12-15 11:18:01,791 INFO L226 Difference]: Without dead ends: 80670 [2021-12-15 11:18:01,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:18:01,821 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 1369 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:01,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1369 Valid, 1040 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80670 states. [2021-12-15 11:18:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80670 to 51442. [2021-12-15 11:18:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51442 states, 51441 states have (on average 1.416477129138236) internal successors, (72865), 51441 states have internal predecessors, (72865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51442 states to 51442 states and 72865 transitions. [2021-12-15 11:18:04,789 INFO L78 Accepts]: Start accepts. Automaton has 51442 states and 72865 transitions. Word has length 111 [2021-12-15 11:18:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:04,790 INFO L470 AbstractCegarLoop]: Abstraction has 51442 states and 72865 transitions. [2021-12-15 11:18:04,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 51442 states and 72865 transitions. [2021-12-15 11:18:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 11:18:04,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:04,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:04,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:18:04,800 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1024882407, now seen corresponding path program 1 times [2021-12-15 11:18:04,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:04,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496630784] [2021-12-15 11:18:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:04,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:18:04,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:04,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496630784] [2021-12-15 11:18:04,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496630784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:04,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:04,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:18:04,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087834293] [2021-12-15 11:18:04,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:04,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:18:04,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:18:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:18:04,880 INFO L87 Difference]: Start difference. First operand 51442 states and 72865 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:09,506 INFO L93 Difference]: Finished difference Result 91680 states and 130568 transitions. [2021-12-15 11:18:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 11:18:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 11:18:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:09,624 INFO L225 Difference]: With dead ends: 91680 [2021-12-15 11:18:09,624 INFO L226 Difference]: Without dead ends: 86174 [2021-12-15 11:18:09,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:18:09,648 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1368 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:09,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1368 Valid, 947 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86174 states. [2021-12-15 11:18:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86174 to 56946. [2021-12-15 11:18:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56946 states, 56945 states have (on average 1.4178066555448239) internal successors, (80737), 56945 states have internal predecessors, (80737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56946 states to 56946 states and 80737 transitions. [2021-12-15 11:18:13,034 INFO L78 Accepts]: Start accepts. Automaton has 56946 states and 80737 transitions. Word has length 111 [2021-12-15 11:18:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:13,034 INFO L470 AbstractCegarLoop]: Abstraction has 56946 states and 80737 transitions. [2021-12-15 11:18:13,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 56946 states and 80737 transitions. [2021-12-15 11:18:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 11:18:13,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:13,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:13,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 11:18:13,045 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:13,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1441172198, now seen corresponding path program 1 times [2021-12-15 11:18:13,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:13,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422431760] [2021-12-15 11:18:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:13,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:13,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422431760] [2021-12-15 11:18:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422431760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:13,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:13,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:13,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964830645] [2021-12-15 11:18:13,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:13,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:13,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:13,090 INFO L87 Difference]: Start difference. First operand 56946 states and 80737 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)