./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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 5c7b2e547f39f7d53d20335ecc1b1fbde6acdc52384cb52caa86017352bf317a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 16:37:25,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 16:37:25,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 16:37:25,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 16:37:25,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 16:37:25,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 16:37:25,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 16:37:25,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 16:37:25,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 16:37:25,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 16:37:25,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 16:37:25,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 16:37:25,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 16:37:25,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 16:37:25,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 16:37:25,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 16:37:25,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 16:37:25,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 16:37:25,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 16:37:25,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 16:37:25,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 16:37:25,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 16:37:25,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 16:37:25,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 16:37:25,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 16:37:25,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 16:37:25,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 16:37:25,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 16:37:25,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 16:37:25,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 16:37:25,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 16:37:25,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 16:37:25,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 16:37:25,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 16:37:25,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 16:37:25,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 16:37:25,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 16:37:25,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 16:37:25,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 16:37:25,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 16:37:25,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 16:37:25,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 16:37:25,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 16:37:25,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 16:37:25,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 16:37:25,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 16:37:25,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 16:37:25,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 16:37:25,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 16:37:25,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 16:37:25,864 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 16:37:25,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 16:37:25,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 16:37:25,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 16:37:25,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 16:37:25,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 16:37:25,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 16:37:25,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 16:37:25,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 16:37:25,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 16:37:25,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 16:37:25,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 16:37:25,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 16:37:25,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 16:37:25,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 16:37:25,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 16:37:25,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:37:25,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 16:37:25,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 16:37:25,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 16:37:25,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 16:37:25,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 16:37:25,869 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 16:37:25,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 16:37:25,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 16:37:25,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 16:37:25,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c7b2e547f39f7d53d20335ecc1b1fbde6acdc52384cb52caa86017352bf317a [2021-12-17 16:37:26,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 16:37:26,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 16:37:26,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 16:37:26,112 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 16:37:26,112 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 16:37:26,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-17 16:37:26,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afe7391dc/57e572c526e54126a8e279a65b27db04/FLAG0242219cd [2021-12-17 16:37:26,574 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 16:37:26,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-17 16:37:26,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afe7391dc/57e572c526e54126a8e279a65b27db04/FLAG0242219cd [2021-12-17 16:37:26,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afe7391dc/57e572c526e54126a8e279a65b27db04 [2021-12-17 16:37:26,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 16:37:26,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 16:37:26,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 16:37:26,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 16:37:26,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 16:37:27,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:37:26" (1/1) ... [2021-12-17 16:37:27,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a93ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27, skipping insertion in model container [2021-12-17 16:37:27,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:37:26" (1/1) ... [2021-12-17 16:37:27,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 16:37:27,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 16:37:27,190 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-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7834,7847] [2021-12-17 16:37:27,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:37:27,230 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 16:37:27,259 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-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7834,7847] [2021-12-17 16:37:27,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:37:27,288 INFO L208 MainTranslator]: Completed translation [2021-12-17 16:37:27,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27 WrapperNode [2021-12-17 16:37:27,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 16:37:27,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 16:37:27,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 16:37:27,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 16:37:27,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,339 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 616 [2021-12-17 16:37:27,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 16:37:27,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 16:37:27,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 16:37:27,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 16:37:27,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 16:37:27,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 16:37:27,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 16:37:27,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 16:37:27,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (1/1) ... [2021-12-17 16:37:27,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:37:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 16:37:27,420 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) [2021-12-17 16:37:27,430 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 [2021-12-17 16:37:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 16:37:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 16:37:27,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 16:37:27,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 16:37:27,571 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 16:37:27,572 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 16:37:27,955 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 16:37:27,961 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 16:37:27,961 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 16:37:27,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:37:27 BoogieIcfgContainer [2021-12-17 16:37:27,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 16:37:27,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 16:37:27,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 16:37:27,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 16:37:27,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:37:26" (1/3) ... [2021-12-17 16:37:27,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b59479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:37:27, skipping insertion in model container [2021-12-17 16:37:27,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:27" (2/3) ... [2021-12-17 16:37:27,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b59479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:37:27, skipping insertion in model container [2021-12-17 16:37:27,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:37:27" (3/3) ... [2021-12-17 16:37:27,974 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-17 16:37:27,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 16:37:27,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 16:37:28,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 16:37:28,016 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 [2021-12-17 16:37:28,016 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 16:37:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7551020408163265) internal successors, (258), 148 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:28,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 16:37:28,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:28,038 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] [2021-12-17 16:37:28,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:28,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1577999170, now seen corresponding path program 1 times [2021-12-17 16:37:28,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:28,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389962264] [2021-12-17 16:37:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:28,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:28,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:28,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389962264] [2021-12-17 16:37:28,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389962264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:28,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:28,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 16:37:28,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576365853] [2021-12-17 16:37:28,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:28,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:37:28,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:28,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:37:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:28,453 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7551020408163265) internal successors, (258), 148 states have internal predecessors, (258), 0 states have call successors, (0), 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 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:28,736 INFO L93 Difference]: Finished difference Result 832 states and 1345 transitions. [2021-12-17 16:37:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 16:37:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-12-17 16:37:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:28,748 INFO L225 Difference]: With dead ends: 832 [2021-12-17 16:37:28,749 INFO L226 Difference]: Without dead ends: 750 [2021-12-17 16:37:28,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-17 16:37:28,753 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 1621 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:28,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 1874 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-12-17 16:37:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 226. [2021-12-17 16:37:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.4622222222222223) internal successors, (329), 225 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 329 transitions. [2021-12-17 16:37:28,793 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 329 transitions. Word has length 75 [2021-12-17 16:37:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:28,793 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 329 transitions. [2021-12-17 16:37:28,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 329 transitions. [2021-12-17 16:37:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 16:37:28,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:28,796 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] [2021-12-17 16:37:28,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 16:37:28,796 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:28,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1882204162, now seen corresponding path program 1 times [2021-12-17 16:37:28,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:28,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794340620] [2021-12-17 16:37:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:28,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:28,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:28,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794340620] [2021-12-17 16:37:28,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794340620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:28,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:28,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 16:37:28,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103470170] [2021-12-17 16:37:28,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:28,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:37:28,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:37:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:28,907 INFO L87 Difference]: Start difference. First operand 226 states and 329 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:29,043 INFO L93 Difference]: Finished difference Result 921 states and 1431 transitions. [2021-12-17 16:37:29,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 16:37:29,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 16:37:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:29,046 INFO L225 Difference]: With dead ends: 921 [2021-12-17 16:37:29,046 INFO L226 Difference]: Without dead ends: 801 [2021-12-17 16:37:29,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 16:37:29,048 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 1028 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:29,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 1248 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-12-17 16:37:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 355. [2021-12-17 16:37:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.5112994350282485) internal successors, (535), 354 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 535 transitions. [2021-12-17 16:37:29,071 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 535 transitions. Word has length 77 [2021-12-17 16:37:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:29,072 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 535 transitions. [2021-12-17 16:37:29,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 535 transitions. [2021-12-17 16:37:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 16:37:29,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:29,073 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] [2021-12-17 16:37:29,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 16:37:29,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:29,074 INFO L85 PathProgramCache]: Analyzing trace with hash -120044916, now seen corresponding path program 1 times [2021-12-17 16:37:29,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:29,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603247439] [2021-12-17 16:37:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:29,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:29,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:29,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603247439] [2021-12-17 16:37:29,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603247439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:29,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:29,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 16:37:29,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628195082] [2021-12-17 16:37:29,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:29,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:37:29,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:37:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:29,151 INFO L87 Difference]: Start difference. First operand 355 states and 535 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:29,288 INFO L93 Difference]: Finished difference Result 1045 states and 1629 transitions. [2021-12-17 16:37:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 16:37:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 16:37:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:29,291 INFO L225 Difference]: With dead ends: 1045 [2021-12-17 16:37:29,291 INFO L226 Difference]: Without dead ends: 925 [2021-12-17 16:37:29,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 16:37:29,293 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 1295 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:29,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1295 Valid, 1056 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-12-17 16:37:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 538. [2021-12-17 16:37:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.5400372439478585) internal successors, (827), 537 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 827 transitions. [2021-12-17 16:37:29,326 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 827 transitions. Word has length 77 [2021-12-17 16:37:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:29,327 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 827 transitions. [2021-12-17 16:37:29,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 827 transitions. [2021-12-17 16:37:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 16:37:29,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:29,335 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] [2021-12-17 16:37:29,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 16:37:29,335 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1696566079, now seen corresponding path program 1 times [2021-12-17 16:37:29,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:29,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425053658] [2021-12-17 16:37:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:29,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:29,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:29,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425053658] [2021-12-17 16:37:29,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425053658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:29,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:29,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 16:37:29,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502534219] [2021-12-17 16:37:29,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:29,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:37:29,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:29,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:37:29,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:29,533 INFO L87 Difference]: Start difference. First operand 538 states and 827 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:29,692 INFO L93 Difference]: Finished difference Result 955 states and 1491 transitions. [2021-12-17 16:37:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 16:37:29,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 16:37:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:29,694 INFO L225 Difference]: With dead ends: 955 [2021-12-17 16:37:29,695 INFO L226 Difference]: Without dead ends: 540 [2021-12-17 16:37:29,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-17 16:37:29,696 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 352 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:29,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 808 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-17 16:37:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 538. [2021-12-17 16:37:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.5325884543761639) internal successors, (823), 537 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 823 transitions. [2021-12-17 16:37:29,714 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 823 transitions. Word has length 77 [2021-12-17 16:37:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:29,715 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 823 transitions. [2021-12-17 16:37:29,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 823 transitions. [2021-12-17 16:37:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 16:37:29,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:29,716 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] [2021-12-17 16:37:29,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 16:37:29,716 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1904417886, now seen corresponding path program 1 times [2021-12-17 16:37:29,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:29,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370661358] [2021-12-17 16:37:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:29,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:29,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:29,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370661358] [2021-12-17 16:37:29,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370661358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:29,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:29,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:37:29,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038167848] [2021-12-17 16:37:29,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:29,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:37:29,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:29,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:37:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:37:29,751 INFO L87 Difference]: Start difference. First operand 538 states and 823 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:29,793 INFO L93 Difference]: Finished difference Result 1323 states and 2066 transitions. [2021-12-17 16:37:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:37:29,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 16:37:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:29,797 INFO L225 Difference]: With dead ends: 1323 [2021-12-17 16:37:29,797 INFO L226 Difference]: Without dead ends: 908 [2021-12-17 16:37:29,798 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 [2021-12-17 16:37:29,799 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 83 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:29,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 467 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:37:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-12-17 16:37:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 892. [2021-12-17 16:37:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.5387205387205387) internal successors, (1371), 891 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1371 transitions. [2021-12-17 16:37:29,844 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1371 transitions. Word has length 77 [2021-12-17 16:37:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:29,845 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 1371 transitions. [2021-12-17 16:37:29,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1371 transitions. [2021-12-17 16:37:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 16:37:29,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:29,846 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] [2021-12-17 16:37:29,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 16:37:29,846 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1745860562, now seen corresponding path program 1 times [2021-12-17 16:37:29,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616633560] [2021-12-17 16:37:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:29,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:29,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:29,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616633560] [2021-12-17 16:37:29,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616633560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:29,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:29,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 16:37:29,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613525333] [2021-12-17 16:37:29,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:29,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:37:29,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:37:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:29,919 INFO L87 Difference]: Start difference. First operand 892 states and 1371 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:30,075 INFO L93 Difference]: Finished difference Result 2023 states and 3143 transitions. [2021-12-17 16:37:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 16:37:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 16:37:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:30,082 INFO L225 Difference]: With dead ends: 2023 [2021-12-17 16:37:30,082 INFO L226 Difference]: Without dead ends: 1802 [2021-12-17 16:37:30,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 16:37:30,086 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 1037 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:30,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 1397 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-12-17 16:37:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1112. [2021-12-17 16:37:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 1.5445544554455446) internal successors, (1716), 1111 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1716 transitions. [2021-12-17 16:37:30,148 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1716 transitions. Word has length 77 [2021-12-17 16:37:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:30,148 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1716 transitions. [2021-12-17 16:37:30,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1716 transitions. [2021-12-17 16:37:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 16:37:30,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:30,149 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] [2021-12-17 16:37:30,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 16:37:30,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1856951880, now seen corresponding path program 1 times [2021-12-17 16:37:30,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:30,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398796842] [2021-12-17 16:37:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:30,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:30,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398796842] [2021-12-17 16:37:30,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398796842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:30,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:30,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 16:37:30,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029197847] [2021-12-17 16:37:30,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:30,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:37:30,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:30,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:37:30,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:30,235 INFO L87 Difference]: Start difference. First operand 1112 states and 1716 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:30,409 INFO L93 Difference]: Finished difference Result 2253 states and 3504 transitions. [2021-12-17 16:37:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 16:37:30,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 16:37:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:30,416 INFO L225 Difference]: With dead ends: 2253 [2021-12-17 16:37:30,416 INFO L226 Difference]: Without dead ends: 2032 [2021-12-17 16:37:30,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 16:37:30,418 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 1080 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:30,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 1702 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-12-17 16:37:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1347. [2021-12-17 16:37:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.549034175334324) internal successors, (2085), 1346 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2085 transitions. [2021-12-17 16:37:30,486 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2085 transitions. Word has length 77 [2021-12-17 16:37:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:30,486 INFO L470 AbstractCegarLoop]: Abstraction has 1347 states and 2085 transitions. [2021-12-17 16:37:30,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2085 transitions. [2021-12-17 16:37:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 16:37:30,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:30,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:30,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 16:37:30,488 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1646651862, now seen corresponding path program 1 times [2021-12-17 16:37:30,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:30,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395901322] [2021-12-17 16:37:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:30,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:30,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:30,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395901322] [2021-12-17 16:37:30,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395901322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:30,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:30,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 16:37:30,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482067576] [2021-12-17 16:37:30,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:30,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:37:30,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:30,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:37:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:30,594 INFO L87 Difference]: Start difference. First operand 1347 states and 2085 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:30,816 INFO L93 Difference]: Finished difference Result 2488 states and 3873 transitions. [2021-12-17 16:37:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 16:37:30,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 16:37:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:30,824 INFO L225 Difference]: With dead ends: 2488 [2021-12-17 16:37:30,825 INFO L226 Difference]: Without dead ends: 2267 [2021-12-17 16:37:30,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 16:37:30,827 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 1087 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:30,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1265 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-12-17 16:37:30,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 1582. [2021-12-17 16:37:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 1.5521821631878558) internal successors, (2454), 1581 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2454 transitions. [2021-12-17 16:37:30,904 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2454 transitions. Word has length 77 [2021-12-17 16:37:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:30,904 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 2454 transitions. [2021-12-17 16:37:30,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2454 transitions. [2021-12-17 16:37:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 16:37:30,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:30,905 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] [2021-12-17 16:37:30,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 16:37:30,906 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1055850175, now seen corresponding path program 1 times [2021-12-17 16:37:30,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:30,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192493803] [2021-12-17 16:37:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:30,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:30,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:30,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192493803] [2021-12-17 16:37:30,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192493803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:30,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:30,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:37:30,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118562644] [2021-12-17 16:37:30,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:30,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:37:30,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:37:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:37:30,977 INFO L87 Difference]: Start difference. First operand 1582 states and 2454 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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) [2021-12-17 16:37:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:31,124 INFO L93 Difference]: Finished difference Result 3111 states and 4850 transitions. [2021-12-17 16:37:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:37:31,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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 [2021-12-17 16:37:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:31,129 INFO L225 Difference]: With dead ends: 3111 [2021-12-17 16:37:31,129 INFO L226 Difference]: Without dead ends: 1582 [2021-12-17 16:37:31,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:31,133 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 507 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:31,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 143 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-17 16:37:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1582. [2021-12-17 16:37:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 1.5351043643263758) internal successors, (2427), 1581 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2427 transitions. [2021-12-17 16:37:31,210 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2427 transitions. Word has length 78 [2021-12-17 16:37:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:31,210 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 2427 transitions. [2021-12-17 16:37:31,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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) [2021-12-17 16:37:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2427 transitions. [2021-12-17 16:37:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 16:37:31,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:31,212 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] [2021-12-17 16:37:31,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 16:37:31,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1773625280, now seen corresponding path program 1 times [2021-12-17 16:37:31,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:31,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211065932] [2021-12-17 16:37:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:31,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:31,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:31,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211065932] [2021-12-17 16:37:31,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211065932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:31,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:31,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:37:31,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317232959] [2021-12-17 16:37:31,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:31,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:37:31,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:31,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:37:31,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:37:31,254 INFO L87 Difference]: Start difference. First operand 1582 states and 2427 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 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) [2021-12-17 16:37:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:31,417 INFO L93 Difference]: Finished difference Result 3115 states and 4801 transitions. [2021-12-17 16:37:31,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:37:31,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 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 [2021-12-17 16:37:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:31,422 INFO L225 Difference]: With dead ends: 3115 [2021-12-17 16:37:31,422 INFO L226 Difference]: Without dead ends: 1582 [2021-12-17 16:37:31,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:31,424 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 512 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:31,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 135 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-17 16:37:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1582. [2021-12-17 16:37:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 1.5180265654648957) internal successors, (2400), 1581 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2400 transitions. [2021-12-17 16:37:31,495 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2400 transitions. Word has length 79 [2021-12-17 16:37:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:31,495 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 2400 transitions. [2021-12-17 16:37:31,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 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) [2021-12-17 16:37:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2400 transitions. [2021-12-17 16:37:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 16:37:31,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:31,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:31,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 16:37:31,498 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash -840238059, now seen corresponding path program 1 times [2021-12-17 16:37:31,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:31,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034062565] [2021-12-17 16:37:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:31,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:31,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:31,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034062565] [2021-12-17 16:37:31,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034062565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:31,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:31,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:37:31,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93417616] [2021-12-17 16:37:31,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:31,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:37:31,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:31,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:37:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:37:31,562 INFO L87 Difference]: Start difference. First operand 1582 states and 2400 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:31,709 INFO L93 Difference]: Finished difference Result 3127 states and 4762 transitions. [2021-12-17 16:37:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:37:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-17 16:37:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:31,713 INFO L225 Difference]: With dead ends: 3127 [2021-12-17 16:37:31,714 INFO L226 Difference]: Without dead ends: 1582 [2021-12-17 16:37:31,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:31,716 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 539 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:31,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 111 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-17 16:37:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1582. [2021-12-17 16:37:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 1.5009487666034156) internal successors, (2373), 1581 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2373 transitions. [2021-12-17 16:37:31,785 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2373 transitions. Word has length 80 [2021-12-17 16:37:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:31,785 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 2373 transitions. [2021-12-17 16:37:31,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2373 transitions. [2021-12-17 16:37:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 16:37:31,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:31,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:31,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 16:37:31,786 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:31,787 INFO L85 PathProgramCache]: Analyzing trace with hash -511041836, now seen corresponding path program 1 times [2021-12-17 16:37:31,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:31,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494224468] [2021-12-17 16:37:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:31,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:31,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:31,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494224468] [2021-12-17 16:37:31,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494224468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:31,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:31,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:37:31,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274982364] [2021-12-17 16:37:31,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:31,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:37:31,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:37:31,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:37:31,827 INFO L87 Difference]: Start difference. First operand 1582 states and 2373 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:31,956 INFO L93 Difference]: Finished difference Result 3123 states and 4704 transitions. [2021-12-17 16:37:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:37:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-17 16:37:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:31,961 INFO L225 Difference]: With dead ends: 3123 [2021-12-17 16:37:31,961 INFO L226 Difference]: Without dead ends: 1582 [2021-12-17 16:37:31,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:31,964 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 521 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:31,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 119 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-17 16:37:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1582. [2021-12-17 16:37:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 1.4838709677419355) internal successors, (2346), 1581 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2346 transitions. [2021-12-17 16:37:32,060 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2346 transitions. Word has length 81 [2021-12-17 16:37:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:32,060 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 2346 transitions. [2021-12-17 16:37:32,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2346 transitions. [2021-12-17 16:37:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 16:37:32,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:32,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:32,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 16:37:32,062 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1919227007, now seen corresponding path program 1 times [2021-12-17 16:37:32,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:32,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949059128] [2021-12-17 16:37:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:32,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:32,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:32,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949059128] [2021-12-17 16:37:32,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949059128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:32,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:32,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:37:32,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66914355] [2021-12-17 16:37:32,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:32,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:37:32,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:37:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:37:32,103 INFO L87 Difference]: Start difference. First operand 1582 states and 2346 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:32,242 INFO L93 Difference]: Finished difference Result 3119 states and 4646 transitions. [2021-12-17 16:37:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:37:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-17 16:37:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:32,247 INFO L225 Difference]: With dead ends: 3119 [2021-12-17 16:37:32,247 INFO L226 Difference]: Without dead ends: 1582 [2021-12-17 16:37:32,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:37:32,249 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 503 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:32,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 127 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-17 16:37:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1582. [2021-12-17 16:37:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 1.4667931688804554) internal successors, (2319), 1581 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) [2021-12-17 16:37:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2319 transitions. [2021-12-17 16:37:32,344 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2319 transitions. Word has length 82 [2021-12-17 16:37:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:32,344 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 2319 transitions. [2021-12-17 16:37:32,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2319 transitions. [2021-12-17 16:37:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 16:37:32,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:32,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:32,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 16:37:32,346 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:32,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1274660632, now seen corresponding path program 1 times [2021-12-17 16:37:32,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:32,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528424718] [2021-12-17 16:37:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:32,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:32,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:32,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528424718] [2021-12-17 16:37:32,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528424718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:32,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:32,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 16:37:32,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000933410] [2021-12-17 16:37:32,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:32,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:37:32,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:37:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:37:32,397 INFO L87 Difference]: Start difference. First operand 1582 states and 2319 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:32,551 INFO L93 Difference]: Finished difference Result 2599 states and 3819 transitions. [2021-12-17 16:37:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:37:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-17 16:37:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:32,559 INFO L225 Difference]: With dead ends: 2599 [2021-12-17 16:37:32,559 INFO L226 Difference]: Without dead ends: 2597 [2021-12-17 16:37:32,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:37:32,560 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 168 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:32,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 773 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:37:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-12-17 16:37:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1594. [2021-12-17 16:37:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 1.4588826114249842) internal successors, (2324), 1593 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2324 transitions. [2021-12-17 16:37:32,677 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2324 transitions. Word has length 83 [2021-12-17 16:37:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:32,677 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2324 transitions. [2021-12-17 16:37:32,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2324 transitions. [2021-12-17 16:37:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 16:37:32,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:32,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:32,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 16:37:32,679 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1071199524, now seen corresponding path program 1 times [2021-12-17 16:37:32,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:32,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451164615] [2021-12-17 16:37:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:32,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:32,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451164615] [2021-12-17 16:37:32,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451164615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:32,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:32,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 16:37:32,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239645059] [2021-12-17 16:37:32,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:32,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 16:37:32,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 16:37:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:37:32,790 INFO L87 Difference]: Start difference. First operand 1594 states and 2324 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:33,215 INFO L93 Difference]: Finished difference Result 4542 states and 6660 transitions. [2021-12-17 16:37:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 16:37:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-17 16:37:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:33,224 INFO L225 Difference]: With dead ends: 4542 [2021-12-17 16:37:33,224 INFO L226 Difference]: Without dead ends: 3038 [2021-12-17 16:37:33,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-17 16:37:33,226 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1157 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:33,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 324 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:37:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-12-17 16:37:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 1594. [2021-12-17 16:37:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 1.458254865034526) internal successors, (2323), 1593 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2323 transitions. [2021-12-17 16:37:33,343 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2323 transitions. Word has length 83 [2021-12-17 16:37:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:33,343 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2323 transitions. [2021-12-17 16:37:33,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2323 transitions. [2021-12-17 16:37:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 16:37:33,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:33,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:33,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 16:37:33,344 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:33,345 INFO L85 PathProgramCache]: Analyzing trace with hash -49884989, now seen corresponding path program 1 times [2021-12-17 16:37:33,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:33,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535087204] [2021-12-17 16:37:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:33,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:33,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:33,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535087204] [2021-12-17 16:37:33,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535087204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:33,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:33,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 16:37:33,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739150482] [2021-12-17 16:37:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:33,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 16:37:33,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 16:37:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-17 16:37:33,544 INFO L87 Difference]: Start difference. First operand 1594 states and 2323 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:34,779 INFO L93 Difference]: Finished difference Result 7742 states and 11273 transitions. [2021-12-17 16:37:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 16:37:34,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-17 16:37:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:34,805 INFO L225 Difference]: With dead ends: 7742 [2021-12-17 16:37:34,805 INFO L226 Difference]: Without dead ends: 6269 [2021-12-17 16:37:34,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-12-17 16:37:34,809 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1719 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:34,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 910 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 16:37:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-12-17 16:37:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 1600. [2021-12-17 16:37:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 1.456535334584115) internal successors, (2329), 1599 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2329 transitions. [2021-12-17 16:37:34,962 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2329 transitions. Word has length 84 [2021-12-17 16:37:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:34,962 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2329 transitions. [2021-12-17 16:37:34,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2329 transitions. [2021-12-17 16:37:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 16:37:34,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:34,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:34,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 16:37:34,963 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 944774863, now seen corresponding path program 1 times [2021-12-17 16:37:34,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:34,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863413223] [2021-12-17 16:37:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:34,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:35,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863413223] [2021-12-17 16:37:35,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863413223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:35,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:35,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 16:37:35,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321754634] [2021-12-17 16:37:35,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:35,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 16:37:35,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 16:37:35,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 16:37:35,075 INFO L87 Difference]: Start difference. First operand 1600 states and 2329 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:35,692 INFO L93 Difference]: Finished difference Result 4649 states and 6797 transitions. [2021-12-17 16:37:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 16:37:35,692 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-17 16:37:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:35,700 INFO L225 Difference]: With dead ends: 4649 [2021-12-17 16:37:35,700 INFO L226 Difference]: Without dead ends: 3150 [2021-12-17 16:37:35,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-12-17 16:37:35,702 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 919 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:35,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 435 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:37:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-12-17 16:37:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 1594. [2021-12-17 16:37:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 1.4569993722536096) internal successors, (2321), 1593 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2321 transitions. [2021-12-17 16:37:35,872 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2321 transitions. Word has length 84 [2021-12-17 16:37:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:35,872 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2321 transitions. [2021-12-17 16:37:35,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2321 transitions. [2021-12-17 16:37:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 16:37:35,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:35,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:35,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 16:37:35,874 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1500586117, now seen corresponding path program 1 times [2021-12-17 16:37:35,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:35,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22560191] [2021-12-17 16:37:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:35,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:35,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:35,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22560191] [2021-12-17 16:37:35,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22560191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:35,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:35,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 16:37:35,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821994342] [2021-12-17 16:37:35,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:35,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 16:37:35,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:35,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 16:37:35,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 16:37:35,990 INFO L87 Difference]: Start difference. First operand 1594 states and 2321 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:36,650 INFO L93 Difference]: Finished difference Result 4634 states and 6773 transitions. [2021-12-17 16:37:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 16:37:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-17 16:37:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:36,656 INFO L225 Difference]: With dead ends: 4634 [2021-12-17 16:37:36,656 INFO L226 Difference]: Without dead ends: 3145 [2021-12-17 16:37:36,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-12-17 16:37:36,659 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1165 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:36,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 423 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:37:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-12-17 16:37:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 1594. [2021-12-17 16:37:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 1.4544883866917766) internal successors, (2317), 1593 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2317 transitions. [2021-12-17 16:37:36,815 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2317 transitions. Word has length 84 [2021-12-17 16:37:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:36,815 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2317 transitions. [2021-12-17 16:37:36,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2317 transitions. [2021-12-17 16:37:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 16:37:36,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:36,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:36,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 16:37:36,816 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:36,817 INFO L85 PathProgramCache]: Analyzing trace with hash 842057330, now seen corresponding path program 1 times [2021-12-17 16:37:36,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:36,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892527338] [2021-12-17 16:37:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:36,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:36,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:36,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892527338] [2021-12-17 16:37:36,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892527338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:36,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:36,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 16:37:36,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840381847] [2021-12-17 16:37:36,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:36,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 16:37:36,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 16:37:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 16:37:36,930 INFO L87 Difference]: Start difference. First operand 1594 states and 2317 transitions. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:37,711 INFO L93 Difference]: Finished difference Result 4604 states and 6721 transitions. [2021-12-17 16:37:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 16:37:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-12-17 16:37:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:37,716 INFO L225 Difference]: With dead ends: 4604 [2021-12-17 16:37:37,717 INFO L226 Difference]: Without dead ends: 3135 [2021-12-17 16:37:37,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-12-17 16:37:37,719 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1390 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:37,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1390 Valid, 423 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:37:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-12-17 16:37:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 1594. [2021-12-17 16:37:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 1.4513496547394853) internal successors, (2312), 1593 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2312 transitions. [2021-12-17 16:37:37,875 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2312 transitions. Word has length 85 [2021-12-17 16:37:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:37,875 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2312 transitions. [2021-12-17 16:37:37,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2312 transitions. [2021-12-17 16:37:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 16:37:37,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:37,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:37,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 16:37:37,877 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2050544046, now seen corresponding path program 1 times [2021-12-17 16:37:37,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:37,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709310253] [2021-12-17 16:37:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:37,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:38,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709310253] [2021-12-17 16:37:38,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709310253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:38,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:38,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 16:37:38,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659344397] [2021-12-17 16:37:38,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:38,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 16:37:38,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:38,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 16:37:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 16:37:38,058 INFO L87 Difference]: Start difference. First operand 1594 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:43,041 INFO L93 Difference]: Finished difference Result 26935 states and 39005 transitions. [2021-12-17 16:37:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 16:37:43,042 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-12-17 16:37:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:43,092 INFO L225 Difference]: With dead ends: 26935 [2021-12-17 16:37:43,093 INFO L226 Difference]: Without dead ends: 25491 [2021-12-17 16:37:43,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 16:37:43,103 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 5476 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5476 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:43,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5476 Valid, 1316 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 16:37:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25491 states. [2021-12-17 16:37:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25491 to 1609. [2021-12-17 16:37:43,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 1.4465174129353233) internal successors, (2326), 1608 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2326 transitions. [2021-12-17 16:37:43,564 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2326 transitions. Word has length 86 [2021-12-17 16:37:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:43,565 INFO L470 AbstractCegarLoop]: Abstraction has 1609 states and 2326 transitions. [2021-12-17 16:37:43,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2326 transitions. [2021-12-17 16:37:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 16:37:43,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:43,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:43,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 16:37:43,566 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:43,566 INFO L85 PathProgramCache]: Analyzing trace with hash 420822697, now seen corresponding path program 1 times [2021-12-17 16:37:43,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:43,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841709165] [2021-12-17 16:37:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:43,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:44,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:44,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841709165] [2021-12-17 16:37:44,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841709165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:44,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:44,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-12-17 16:37:44,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038922053] [2021-12-17 16:37:44,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:44,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 16:37:44,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 16:37:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 16:37:44,409 INFO L87 Difference]: Start difference. First operand 1609 states and 2326 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:51,202 INFO L93 Difference]: Finished difference Result 11662 states and 17071 transitions. [2021-12-17 16:37:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 16:37:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-17 16:37:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:51,219 INFO L225 Difference]: With dead ends: 11662 [2021-12-17 16:37:51,219 INFO L226 Difference]: Without dead ends: 11216 [2021-12-17 16:37:51,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=702, Invalid=4128, Unknown=0, NotChecked=0, Total=4830 [2021-12-17 16:37:51,223 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 2166 mSDsluCounter, 10134 mSDsCounter, 0 mSdLazyCounter, 7361 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2166 SdHoareTripleChecker+Valid, 10681 SdHoareTripleChecker+Invalid, 7452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 7361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:51,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2166 Valid, 10681 Invalid, 7452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 7361 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 16:37:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11216 states. [2021-12-17 16:37:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11216 to 1644. [2021-12-17 16:37:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 1.4430919050517346) internal successors, (2371), 1643 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2371 transitions. [2021-12-17 16:37:51,563 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2371 transitions. Word has length 87 [2021-12-17 16:37:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:51,563 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 2371 transitions. [2021-12-17 16:37:51,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2371 transitions. [2021-12-17 16:37:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 16:37:51,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:51,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:51,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 16:37:51,565 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash 916423674, now seen corresponding path program 1 times [2021-12-17 16:37:51,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:51,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168045997] [2021-12-17 16:37:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:51,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:51,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:51,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168045997] [2021-12-17 16:37:51,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168045997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:51,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:51,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 16:37:51,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920438982] [2021-12-17 16:37:51,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:51,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 16:37:51,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 16:37:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 16:37:51,689 INFO L87 Difference]: Start difference. First operand 1644 states and 2371 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:52,670 INFO L93 Difference]: Finished difference Result 4601 states and 6690 transitions. [2021-12-17 16:37:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 16:37:52,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-17 16:37:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:52,676 INFO L225 Difference]: With dead ends: 4601 [2021-12-17 16:37:52,677 INFO L226 Difference]: Without dead ends: 3158 [2021-12-17 16:37:52,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-12-17 16:37:52,679 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 789 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:52,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 544 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:37:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3158 states. [2021-12-17 16:37:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3158 to 1629. [2021-12-17 16:37:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 1.444103194103194) internal successors, (2351), 1628 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2351 transitions. [2021-12-17 16:37:52,961 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2351 transitions. Word has length 87 [2021-12-17 16:37:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:52,961 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 2351 transitions. [2021-12-17 16:37:52,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2351 transitions. [2021-12-17 16:37:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 16:37:52,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:52,962 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:52,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 16:37:52,963 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:52,963 INFO L85 PathProgramCache]: Analyzing trace with hash -891179609, now seen corresponding path program 1 times [2021-12-17 16:37:52,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:52,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157609570] [2021-12-17 16:37:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:52,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:53,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:53,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157609570] [2021-12-17 16:37:53,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157609570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:53,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:53,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 16:37:53,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299810460] [2021-12-17 16:37:53,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:53,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 16:37:53,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:53,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 16:37:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 16:37:53,212 INFO L87 Difference]: Start difference. First operand 1629 states and 2351 transitions. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:55,210 INFO L93 Difference]: Finished difference Result 6529 states and 9536 transitions. [2021-12-17 16:37:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 16:37:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-17 16:37:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:55,218 INFO L225 Difference]: With dead ends: 6529 [2021-12-17 16:37:55,218 INFO L226 Difference]: Without dead ends: 6038 [2021-12-17 16:37:55,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-17 16:37:55,220 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 1227 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:55,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 2557 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:37:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-12-17 16:37:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 1597. [2021-12-17 16:37:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 1.443609022556391) internal successors, (2304), 1596 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2304 transitions. [2021-12-17 16:37:55,595 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2304 transitions. Word has length 87 [2021-12-17 16:37:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:55,595 INFO L470 AbstractCegarLoop]: Abstraction has 1597 states and 2304 transitions. [2021-12-17 16:37:55,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2304 transitions. [2021-12-17 16:37:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 16:37:55,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:55,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:55,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 16:37:55,597 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash -359518871, now seen corresponding path program 1 times [2021-12-17 16:37:55,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:55,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204828985] [2021-12-17 16:37:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:55,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:55,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:55,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204828985] [2021-12-17 16:37:55,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204828985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:55,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:55,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 16:37:55,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930721453] [2021-12-17 16:37:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:55,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 16:37:55,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 16:37:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-17 16:37:55,859 INFO L87 Difference]: Start difference. First operand 1597 states and 2304 transitions. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:37:58,976 INFO L93 Difference]: Finished difference Result 9265 states and 13569 transitions. [2021-12-17 16:37:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 16:37:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-17 16:37:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:37:58,985 INFO L225 Difference]: With dead ends: 9265 [2021-12-17 16:37:58,985 INFO L226 Difference]: Without dead ends: 8819 [2021-12-17 16:37:58,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-12-17 16:37:58,987 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 1546 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 16:37:58,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 2882 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 16:37:58,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2021-12-17 16:37:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 1594. [2021-12-17 16:37:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 1.4413057124921531) internal successors, (2296), 1593 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2296 transitions. [2021-12-17 16:37:59,398 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2296 transitions. Word has length 87 [2021-12-17 16:37:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:37:59,398 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2296 transitions. [2021-12-17 16:37:59,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:37:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2296 transitions. [2021-12-17 16:37:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 16:37:59,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:37:59,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:37:59,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 16:37:59,399 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:37:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:37:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1945453448, now seen corresponding path program 1 times [2021-12-17 16:37:59,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:37:59,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116364557] [2021-12-17 16:37:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:37:59,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:37:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:37:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:37:59,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:37:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116364557] [2021-12-17 16:37:59,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116364557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:37:59,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:37:59,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 16:37:59,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128188346] [2021-12-17 16:37:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:37:59,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 16:37:59,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:37:59,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 16:37:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 16:37:59,639 INFO L87 Difference]: Start difference. First operand 1594 states and 2296 transitions. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:38:02,104 INFO L93 Difference]: Finished difference Result 6470 states and 9438 transitions. [2021-12-17 16:38:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 16:38:02,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-17 16:38:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:38:02,111 INFO L225 Difference]: With dead ends: 6470 [2021-12-17 16:38:02,112 INFO L226 Difference]: Without dead ends: 5991 [2021-12-17 16:38:02,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-17 16:38:02,113 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 1181 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:38:02,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 2427 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:38:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2021-12-17 16:38:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 1556. [2021-12-17 16:38:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 1.4443729903536977) internal successors, (2246), 1555 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 2246 transitions. [2021-12-17 16:38:02,537 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 2246 transitions. Word has length 87 [2021-12-17 16:38:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:38:02,537 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 2246 transitions. [2021-12-17 16:38:02,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 2246 transitions. [2021-12-17 16:38:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 16:38:02,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:38:02,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:38:02,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 16:38:02,538 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:38:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:38:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1842983097, now seen corresponding path program 1 times [2021-12-17 16:38:02,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:38:02,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632474613] [2021-12-17 16:38:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:38:02,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:38:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:38:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:38:02,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:38:02,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632474613] [2021-12-17 16:38:02,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632474613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:38:02,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:38:02,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 16:38:02,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980113817] [2021-12-17 16:38:02,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:38:02,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 16:38:02,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:38:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 16:38:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 16:38:02,810 INFO L87 Difference]: Start difference. First operand 1556 states and 2246 transitions. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:38:05,102 INFO L93 Difference]: Finished difference Result 6345 states and 9278 transitions. [2021-12-17 16:38:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 16:38:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-17 16:38:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:38:05,109 INFO L225 Difference]: With dead ends: 6345 [2021-12-17 16:38:05,109 INFO L226 Difference]: Without dead ends: 5874 [2021-12-17 16:38:05,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-12-17 16:38:05,110 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 1085 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:38:05,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 1347 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:38:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2021-12-17 16:38:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 1529. [2021-12-17 16:38:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 1.4476439790575917) internal successors, (2212), 1528 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2212 transitions. [2021-12-17 16:38:05,580 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2212 transitions. Word has length 87 [2021-12-17 16:38:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:38:05,580 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2212 transitions. [2021-12-17 16:38:05,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2212 transitions. [2021-12-17 16:38:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 16:38:05,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:38:05,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:38:05,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 16:38:05,581 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:38:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:38:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1915986027, now seen corresponding path program 1 times [2021-12-17 16:38:05,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:38:05,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134885378] [2021-12-17 16:38:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:38:05,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:38:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:38:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:38:05,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:38:05,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134885378] [2021-12-17 16:38:05,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134885378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:38:05,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:38:05,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:38:05,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582284241] [2021-12-17 16:38:05,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:38:05,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:38:05,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:38:05,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:38:05,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:38:05,635 INFO L87 Difference]: Start difference. First operand 1529 states and 2212 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:06,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:38:06,310 INFO L93 Difference]: Finished difference Result 3558 states and 5197 transitions. [2021-12-17 16:38:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:38:06,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-12-17 16:38:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:38:06,313 INFO L225 Difference]: With dead ends: 3558 [2021-12-17 16:38:06,313 INFO L226 Difference]: Without dead ends: 2120 [2021-12-17 16:38:06,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:38:06,315 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 88 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:38:06,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 431 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:38:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-12-17 16:38:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2107. [2021-12-17 16:38:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 1.4449192782526117) internal successors, (3043), 2106 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 3043 transitions. [2021-12-17 16:38:06,969 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 3043 transitions. Word has length 88 [2021-12-17 16:38:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:38:06,969 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 3043 transitions. [2021-12-17 16:38:06,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 3043 transitions. [2021-12-17 16:38:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 16:38:06,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:38:06,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:38:06,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 16:38:06,970 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:38:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:38:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1312135, now seen corresponding path program 1 times [2021-12-17 16:38:06,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:38:06,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579281196] [2021-12-17 16:38:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:38:06,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:38:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:38:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:38:07,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:38:07,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579281196] [2021-12-17 16:38:07,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579281196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:38:07,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:38:07,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-12-17 16:38:07,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984009963] [2021-12-17 16:38:07,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:38:07,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 16:38:07,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:38:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 16:38:07,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-12-17 16:38:07,856 INFO L87 Difference]: Start difference. First operand 2107 states and 3043 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:38:18,711 INFO L93 Difference]: Finished difference Result 18354 states and 26747 transitions. [2021-12-17 16:38:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 16:38:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-12-17 16:38:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:38:18,734 INFO L225 Difference]: With dead ends: 18354 [2021-12-17 16:38:18,735 INFO L226 Difference]: Without dead ends: 16336 [2021-12-17 16:38:18,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=543, Invalid=2879, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 16:38:18,749 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 1555 mSDsluCounter, 12584 mSDsCounter, 0 mSdLazyCounter, 8065 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 13268 SdHoareTripleChecker+Invalid, 8129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 8065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 16:38:18,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1555 Valid, 13268 Invalid, 8129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 8065 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 16:38:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16336 states. [2021-12-17 16:38:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16336 to 2128. [2021-12-17 16:38:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 1.4424071462153267) internal successors, (3068), 2127 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3068 transitions. [2021-12-17 16:38:19,560 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3068 transitions. Word has length 88 [2021-12-17 16:38:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:38:19,560 INFO L470 AbstractCegarLoop]: Abstraction has 2128 states and 3068 transitions. [2021-12-17 16:38:19,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3068 transitions. [2021-12-17 16:38:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 16:38:19,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:38:19,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:38:19,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 16:38:19,561 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:38:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:38:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash 316975013, now seen corresponding path program 1 times [2021-12-17 16:38:19,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:38:19,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056263787] [2021-12-17 16:38:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:38:19,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:38:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:38:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:38:19,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:38:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056263787] [2021-12-17 16:38:19,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056263787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:38:19,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:38:19,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 16:38:19,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211058616] [2021-12-17 16:38:19,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:38:19,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 16:38:19,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:38:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 16:38:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-17 16:38:19,849 INFO L87 Difference]: Start difference. First operand 2128 states and 3068 transitions. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:38:25,266 INFO L93 Difference]: Finished difference Result 12885 states and 18777 transitions. [2021-12-17 16:38:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 16:38:25,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-12-17 16:38:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:38:25,279 INFO L225 Difference]: With dead ends: 12885 [2021-12-17 16:38:25,280 INFO L226 Difference]: Without dead ends: 12221 [2021-12-17 16:38:25,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-12-17 16:38:25,282 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 1245 mSDsluCounter, 2841 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 16:38:25,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 3256 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 16:38:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12221 states. [2021-12-17 16:38:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12221 to 2117. [2021-12-17 16:38:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 1.443289224952741) internal successors, (3054), 2116 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3054 transitions. [2021-12-17 16:38:26,111 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3054 transitions. Word has length 89 [2021-12-17 16:38:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:38:26,112 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3054 transitions. [2021-12-17 16:38:26,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3054 transitions. [2021-12-17 16:38:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 16:38:26,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:38:26,113 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:38:26,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 16:38:26,114 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:38:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:38:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash -300937634, now seen corresponding path program 1 times [2021-12-17 16:38:26,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:38:26,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521528806] [2021-12-17 16:38:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:38:26,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:38:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:38:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:38:26,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:38:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521528806] [2021-12-17 16:38:26,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521528806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:38:26,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:38:26,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:38:26,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523874428] [2021-12-17 16:38:26,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:38:26,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:38:26,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:38:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:38:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:38:26,147 INFO L87 Difference]: Start difference. First operand 2117 states and 3054 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:38:27,258 INFO L93 Difference]: Finished difference Result 4369 states and 6347 transitions. [2021-12-17 16:38:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:38:27,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-17 16:38:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:38:27,262 INFO L225 Difference]: With dead ends: 4369 [2021-12-17 16:38:27,262 INFO L226 Difference]: Without dead ends: 2930 [2021-12-17 16:38:27,263 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 [2021-12-17 16:38:27,264 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 80 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 392 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 [2021-12-17 16:38:27,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 392 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:38:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-12-17 16:38:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2820. [2021-12-17 16:38:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2819 states have (on average 1.4434196523589926) internal successors, (4069), 2819 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 4069 transitions. [2021-12-17 16:38:28,391 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 4069 transitions. Word has length 117 [2021-12-17 16:38:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:38:28,391 INFO L470 AbstractCegarLoop]: Abstraction has 2820 states and 4069 transitions. [2021-12-17 16:38:28,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 4069 transitions. [2021-12-17 16:38:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 16:38:28,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:38:28,392 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:38:28,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 16:38:28,392 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:38:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:38:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash -408621153, now seen corresponding path program 1 times [2021-12-17 16:38:28,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:38:28,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518551654] [2021-12-17 16:38:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:38:28,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:38:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:38:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:38:28,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:38:28,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518551654] [2021-12-17 16:38:28,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518551654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:38:28,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:38:28,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:38:28,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325630125] [2021-12-17 16:38:28,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:38:28,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:38:28,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:38:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:38:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:38:28,462 INFO L87 Difference]: Start difference. First operand 2820 states and 4069 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:38:33,335 INFO L93 Difference]: Finished difference Result 14964 states and 21677 transitions. [2021-12-17 16:38:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 16:38:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-17 16:38:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:38:33,350 INFO L225 Difference]: With dead ends: 14964 [2021-12-17 16:38:33,350 INFO L226 Difference]: Without dead ends: 12253 [2021-12-17 16:38:33,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 16:38:33,353 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 1489 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:38:33,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 362 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:38:33,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12253 states. [2021-12-17 16:38:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12253 to 6029. [2021-12-17 16:38:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 6028 states have (on average 1.4465826144658263) internal successors, (8720), 6028 states have internal predecessors, (8720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 8720 transitions. [2021-12-17 16:38:35,570 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 8720 transitions. Word has length 117 [2021-12-17 16:38:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:38:35,570 INFO L470 AbstractCegarLoop]: Abstraction has 6029 states and 8720 transitions. [2021-12-17 16:38:35,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 8720 transitions. [2021-12-17 16:38:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 16:38:35,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:38:35,571 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:38:35,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 16:38:35,571 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:38:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:38:35,571 INFO L85 PathProgramCache]: Analyzing trace with hash 100146981, now seen corresponding path program 1 times [2021-12-17 16:38:35,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:38:35,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749659863] [2021-12-17 16:38:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:38:35,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:38:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:38:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:38:35,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:38:35,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749659863] [2021-12-17 16:38:35,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749659863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:38:35,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:38:35,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:38:35,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061687053] [2021-12-17 16:38:35,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:38:35,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:38:35,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:38:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:38:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:38:35,622 INFO L87 Difference]: Start difference. First operand 6029 states and 8720 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:38:45,086 INFO L93 Difference]: Finished difference Result 30309 states and 43732 transitions. [2021-12-17 16:38:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 16:38:45,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-17 16:38:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:38:45,114 INFO L225 Difference]: With dead ends: 30309 [2021-12-17 16:38:45,114 INFO L226 Difference]: Without dead ends: 24389 [2021-12-17 16:38:45,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 16:38:45,122 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1322 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:38:45,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 366 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:38:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24389 states. [2021-12-17 16:38:50,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24389 to 12947. [2021-12-17 16:38:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12947 states, 12946 states have (on average 1.4461609763633554) internal successors, (18722), 12946 states have internal predecessors, (18722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12947 states to 12947 states and 18722 transitions. [2021-12-17 16:38:50,108 INFO L78 Accepts]: Start accepts. Automaton has 12947 states and 18722 transitions. Word has length 117 [2021-12-17 16:38:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:38:50,109 INFO L470 AbstractCegarLoop]: Abstraction has 12947 states and 18722 transitions. [2021-12-17 16:38:50,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:38:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 12947 states and 18722 transitions. [2021-12-17 16:38:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 16:38:50,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:38:50,110 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:38:50,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 16:38:50,110 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:38:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:38:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1513551975, now seen corresponding path program 1 times [2021-12-17 16:38:50,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:38:50,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982161258] [2021-12-17 16:38:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:38:50,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:38:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:38:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:38:50,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:38:50,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982161258] [2021-12-17 16:38:50,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982161258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:38:50,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:38:50,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:38:50,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94192481] [2021-12-17 16:38:50,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:38:50,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:38:50,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:38:50,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:38:50,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:38:50,165 INFO L87 Difference]: Start difference. First operand 12947 states and 18722 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:39:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:39:07,721 INFO L93 Difference]: Finished difference Result 60063 states and 86938 transitions. [2021-12-17 16:39:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 16:39:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-17 16:39:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:39:07,787 INFO L225 Difference]: With dead ends: 60063 [2021-12-17 16:39:07,787 INFO L226 Difference]: Without dead ends: 47225 [2021-12-17 16:39:07,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 16:39:07,806 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1664 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:39:07,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1664 Valid, 356 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:39:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47225 states. [2021-12-17 16:39:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47225 to 27783. [2021-12-17 16:39:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27783 states, 27782 states have (on average 1.4443164638974877) internal successors, (40126), 27782 states have internal predecessors, (40126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:39:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27783 states to 27783 states and 40126 transitions. [2021-12-17 16:39:18,263 INFO L78 Accepts]: Start accepts. Automaton has 27783 states and 40126 transitions. Word has length 117 [2021-12-17 16:39:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:39:18,263 INFO L470 AbstractCegarLoop]: Abstraction has 27783 states and 40126 transitions. [2021-12-17 16:39:18,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:39:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 27783 states and 40126 transitions. [2021-12-17 16:39:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 16:39:18,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:39:18,264 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:39:18,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 16:39:18,264 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:39:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:39:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1453955309, now seen corresponding path program 1 times [2021-12-17 16:39:18,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:39:18,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838338377] [2021-12-17 16:39:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:39:18,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:39:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:39:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:39:18,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:39:18,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838338377] [2021-12-17 16:39:18,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838338377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:39:18,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:39:18,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:39:18,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487904423] [2021-12-17 16:39:18,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:39:18,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 16:39:18,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:39:18,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 16:39:18,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:39:18,319 INFO L87 Difference]: Start difference. First operand 27783 states and 40126 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:39:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:39:36,358 INFO L93 Difference]: Finished difference Result 75994 states and 109400 transitions. [2021-12-17 16:39:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 16:39:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-17 16:39:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:39:36,424 INFO L225 Difference]: With dead ends: 75994 [2021-12-17 16:39:36,425 INFO L226 Difference]: Without dead ends: 48320 [2021-12-17 16:39:36,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 16:39:36,446 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1149 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:39:36,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 450 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:39:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48320 states. [2021-12-17 16:39:47,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48320 to 29664. [2021-12-17 16:39:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29664 states, 29663 states have (on average 1.437278764791154) internal successors, (42634), 29663 states have internal predecessors, (42634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:39:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29664 states to 29664 states and 42634 transitions. [2021-12-17 16:39:47,728 INFO L78 Accepts]: Start accepts. Automaton has 29664 states and 42634 transitions. Word has length 117 [2021-12-17 16:39:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:39:47,728 INFO L470 AbstractCegarLoop]: Abstraction has 29664 states and 42634 transitions. [2021-12-17 16:39:47,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:39:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 29664 states and 42634 transitions. [2021-12-17 16:39:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-17 16:39:47,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:39:47,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:39:47,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 16:39:47,735 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:39:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:39:47,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1657566870, now seen corresponding path program 1 times [2021-12-17 16:39:47,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:39:47,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966376870] [2021-12-17 16:39:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:39:47,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:39:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:39:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 16:39:47,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:39:47,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966376870] [2021-12-17 16:39:47,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966376870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:39:47,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:39:47,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:39:47,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280601194] [2021-12-17 16:39:47,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:39:47,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:39:47,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:39:47,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:39:47,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:39:47,770 INFO L87 Difference]: Start difference. First operand 29664 states and 42634 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:39:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:39:57,972 INFO L93 Difference]: Finished difference Result 57100 states and 81924 transitions. [2021-12-17 16:39:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:39:57,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 144 [2021-12-17 16:39:57,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:39:58,019 INFO L225 Difference]: With dead ends: 57100 [2021-12-17 16:39:58,020 INFO L226 Difference]: Without dead ends: 27551 [2021-12-17 16:39:58,048 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 [2021-12-17 16:39:58,049 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 77 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 383 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 [2021-12-17 16:39:58,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 383 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:39:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27551 states. [2021-12-17 16:40:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27551 to 26919. [2021-12-17 16:40:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26919 states, 26918 states have (on average 1.4255888253213462) internal successors, (38374), 26918 states have internal predecessors, (38374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:40:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26919 states to 26919 states and 38374 transitions. [2021-12-17 16:40:08,270 INFO L78 Accepts]: Start accepts. Automaton has 26919 states and 38374 transitions. Word has length 144 [2021-12-17 16:40:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:40:08,270 INFO L470 AbstractCegarLoop]: Abstraction has 26919 states and 38374 transitions. [2021-12-17 16:40:08,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:40:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 26919 states and 38374 transitions. [2021-12-17 16:40:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 16:40:08,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:40:08,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:40:08,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 16:40:08,277 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:40:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:40:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash 866129, now seen corresponding path program 1 times [2021-12-17 16:40:08,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:40:08,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204205944] [2021-12-17 16:40:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:40:08,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:40:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:40:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 16:40:08,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:40:08,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204205944] [2021-12-17 16:40:08,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204205944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:40:08,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:40:08,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:40:08,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161814474] [2021-12-17 16:40:08,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:40:08,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:40:08,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:40:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:40:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:40:08,320 INFO L87 Difference]: Start difference. First operand 26919 states and 38374 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:40:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:40:18,206 INFO L93 Difference]: Finished difference Result 51631 states and 73432 transitions. [2021-12-17 16:40:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:40:18,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 145 [2021-12-17 16:40:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:40:18,243 INFO L225 Difference]: With dead ends: 51631 [2021-12-17 16:40:18,243 INFO L226 Difference]: Without dead ends: 24821 [2021-12-17 16:40:18,262 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 [2021-12-17 16:40:18,263 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 70 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 385 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 [2021-12-17 16:40:18,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 385 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:40:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24821 states. [2021-12-17 16:40:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24821 to 24219. [2021-12-17 16:40:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24219 states, 24218 states have (on average 1.4110991824262944) internal successors, (34174), 24218 states have internal predecessors, (34174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:40:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24219 states to 24219 states and 34174 transitions. [2021-12-17 16:40:28,037 INFO L78 Accepts]: Start accepts. Automaton has 24219 states and 34174 transitions. Word has length 145 [2021-12-17 16:40:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:40:28,037 INFO L470 AbstractCegarLoop]: Abstraction has 24219 states and 34174 transitions. [2021-12-17 16:40:28,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:40:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 24219 states and 34174 transitions. [2021-12-17 16:40:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 16:40:28,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:40:28,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:40:28,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 16:40:28,044 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:40:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:40:28,045 INFO L85 PathProgramCache]: Analyzing trace with hash -662530813, now seen corresponding path program 1 times [2021-12-17 16:40:28,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:40:28,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972443424] [2021-12-17 16:40:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:40:28,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:40:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:40:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 16:40:28,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:40:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972443424] [2021-12-17 16:40:28,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972443424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:40:28,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:40:28,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:40:28,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977071345] [2021-12-17 16:40:28,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:40:28,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:40:28,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:40:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:40:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:40:28,080 INFO L87 Difference]: Start difference. First operand 24219 states and 34174 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:40:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:40:36,996 INFO L93 Difference]: Finished difference Result 46231 states and 65032 transitions. [2021-12-17 16:40:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:40:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 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 146 [2021-12-17 16:40:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:40:37,024 INFO L225 Difference]: With dead ends: 46231 [2021-12-17 16:40:37,024 INFO L226 Difference]: Without dead ends: 22121 [2021-12-17 16:40:37,040 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 [2021-12-17 16:40:37,040 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 63 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 385 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 [2021-12-17 16:40:37,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 385 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:40:37,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22121 states. [2021-12-17 16:40:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22121 to 21519. [2021-12-17 16:40:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21519 states, 21518 states have (on average 1.3929733246584255) internal successors, (29974), 21518 states have internal predecessors, (29974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:40:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21519 states to 21519 states and 29974 transitions. [2021-12-17 16:40:45,774 INFO L78 Accepts]: Start accepts. Automaton has 21519 states and 29974 transitions. Word has length 146 [2021-12-17 16:40:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:40:45,774 INFO L470 AbstractCegarLoop]: Abstraction has 21519 states and 29974 transitions. [2021-12-17 16:40:45,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:40:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 21519 states and 29974 transitions. [2021-12-17 16:40:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 16:40:45,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:40:45,777 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:40:45,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 16:40:45,777 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:40:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:40:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1623979454, now seen corresponding path program 1 times [2021-12-17 16:40:45,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:40:45,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246343898] [2021-12-17 16:40:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:40:45,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:40:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:40:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 16:40:45,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:40:45,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246343898] [2021-12-17 16:40:45,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246343898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:40:45,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:40:45,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:40:45,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975849245] [2021-12-17 16:40:45,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:40:45,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:40:45,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:40:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:40:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:40:45,820 INFO L87 Difference]: Start difference. First operand 21519 states and 29974 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:41:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:41:02,560 INFO L93 Difference]: Finished difference Result 62139 states and 86088 transitions. [2021-12-17 16:41:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:41:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 147 [2021-12-17 16:41:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:41:02,617 INFO L225 Difference]: With dead ends: 62139 [2021-12-17 16:41:02,617 INFO L226 Difference]: Without dead ends: 40729 [2021-12-17 16:41:02,632 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 [2021-12-17 16:41:02,632 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 56 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 387 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 [2021-12-17 16:41:02,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 387 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:41:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40729 states. [2021-12-17 16:41:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40729 to 37927. [2021-12-17 16:41:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37927 states, 37926 states have (on average 1.377155513368138) internal successors, (52230), 37926 states have internal predecessors, (52230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:41:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37927 states to 37927 states and 52230 transitions. [2021-12-17 16:41:18,490 INFO L78 Accepts]: Start accepts. Automaton has 37927 states and 52230 transitions. Word has length 147 [2021-12-17 16:41:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:41:18,490 INFO L470 AbstractCegarLoop]: Abstraction has 37927 states and 52230 transitions. [2021-12-17 16:41:18,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:41:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37927 states and 52230 transitions. [2021-12-17 16:41:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-17 16:41:18,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:41:18,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:41:18,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 16:41:18,494 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:41:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:41:18,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1394795012, now seen corresponding path program 1 times [2021-12-17 16:41:18,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:41:18,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983879002] [2021-12-17 16:41:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:41:18,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:41:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:41:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:41:18,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:41:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983879002] [2021-12-17 16:41:18,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983879002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 16:41:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801427046] [2021-12-17 16:41:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:41:18,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 16:41:18,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 16:41:18,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 16:41:18,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 16:41:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:41:18,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 16:41:18,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 16:41:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:41:19,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 16:41:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:41:21,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801427046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 16:41:21,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 16:41:21,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2021-12-17 16:41:21,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877496219] [2021-12-17 16:41:21,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 16:41:21,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 16:41:21,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:41:21,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 16:41:21,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 16:41:21,370 INFO L87 Difference]: Start difference. First operand 37927 states and 52230 transitions. Second operand has 34 states, 34 states have (on average 12.176470588235293) internal successors, (414), 33 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15