./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.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 1aca40c6fb295c9a2e56226d72fd8b40da8517a7cbcabf878259c9e76e6a2f97 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:39:28,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:39:28,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:39:28,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:39:28,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:39:28,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:39:28,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:39:28,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:39:28,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:39:28,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:39:28,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:39:28,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:39:28,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:39:28,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:39:28,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:39:28,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:39:28,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:39:28,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:39:28,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:39:28,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:39:28,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:39:28,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:39:28,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:39:28,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:39:28,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:39:28,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:39:28,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:39:28,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:39:28,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:39:28,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:39:28,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:39:28,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:39:28,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:39:28,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:39:28,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:39:28,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:39:28,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:39:28,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:39:28,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:39:28,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:39:28,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:39:28,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:39:28,770 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:39:28,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:39:28,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:39:28,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:39:28,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:39:28,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:39:28,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:39:28,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:39:28,773 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:39:28,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:39:28,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:39:28,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:39:28,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:39:28,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:39:28,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:39:28,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:39:28,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:39:28,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:39:28,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:39:28,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:39:28,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:39:28,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:39:28,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:39:28,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:39:28,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:39:28,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:39:28,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:39:28,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:39:28,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:39:28,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:39:28,778 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:39:28,778 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:39:28,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:39:28,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:39:28,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca40c6fb295c9a2e56226d72fd8b40da8517a7cbcabf878259c9e76e6a2f97 [2021-12-21 14:39:28,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:39:29,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:39:29,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:39:29,015 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:39:29,016 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:39:29,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-21 14:39:29,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6270d7a/c807da22aaf646f3b80515f757b64697/FLAG0510da563 [2021-12-21 14:39:29,715 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:39:29,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-21 14:39:29,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6270d7a/c807da22aaf646f3b80515f757b64697/FLAG0510da563 [2021-12-21 14:39:30,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6270d7a/c807da22aaf646f3b80515f757b64697 [2021-12-21 14:39:30,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:39:30,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:39:30,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:39:30,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:39:30,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:39:30,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:39:30" (1/1) ... [2021-12-21 14:39:30,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a0e4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:30, skipping insertion in model container [2021-12-21 14:39:30,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:39:30" (1/1) ... [2021-12-21 14:39:30,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:39:30,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:39:30,502 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[11668,11681] [2021-12-21 14:39:30,561 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[18729,18742] [2021-12-21 14:39:31,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:39:31,113 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:39:31,147 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[11668,11681] [2021-12-21 14:39:31,155 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[18729,18742] [2021-12-21 14:39:31,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:39:31,507 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:39:31,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31 WrapperNode [2021-12-21 14:39:31,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:39:31,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:39:31,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:39:31,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:39:31,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:31,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:31,933 INFO L137 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5088 [2021-12-21 14:39:31,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:39:31,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:39:31,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:39:31,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:39:31,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:31,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:32,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:32,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:32,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:32,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:32,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:32,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:39:32,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:39:32,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:39:32,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:39:32,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (1/1) ... [2021-12-21 14:39:32,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:39:32,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:39:32,437 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) [2021-12-21 14:39:32,458 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 [2021-12-21 14:39:32,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:39:32,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:39:32,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:39:32,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:39:32,618 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:39:32,619 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:39:35,974 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:39:35,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:39:35,989 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 14:39:35,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:39:35 BoogieIcfgContainer [2021-12-21 14:39:35,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:39:35,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:39:35,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:39:35,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:39:35,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:39:30" (1/3) ... [2021-12-21 14:39:35,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fed1dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:39:35, skipping insertion in model container [2021-12-21 14:39:35,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:39:31" (2/3) ... [2021-12-21 14:39:35,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fed1dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:39:35, skipping insertion in model container [2021-12-21 14:39:35,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:39:35" (3/3) ... [2021-12-21 14:39:36,000 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-21 14:39:36,004 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:39:36,004 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:39:36,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:39:36,067 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 [2021-12-21 14:39:36,067 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:39:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 14:39:36,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:36,115 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] [2021-12-21 14:39:36,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2021-12-21 14:39:36,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:36,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740724344] [2021-12-21 14:39:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:36,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:36,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:36,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740724344] [2021-12-21 14:39:36,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740724344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:36,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:36,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:39:36,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943104244] [2021-12-21 14:39:36,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:36,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 14:39:36,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 14:39:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 14:39:36,362 INFO L87 Difference]: Start difference. First operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:36,443 INFO L93 Difference]: Finished difference Result 1783 states and 3378 transitions. [2021-12-21 14:39:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 14:39:36,445 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-21 14:39:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:36,462 INFO L225 Difference]: With dead ends: 1783 [2021-12-21 14:39:36,462 INFO L226 Difference]: Without dead ends: 845 [2021-12-21 14:39:36,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 14:39:36,471 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:36,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-21 14:39:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-12-21 14:39:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.8884934756820877) internal successors, (1592), 844 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1592 transitions. [2021-12-21 14:39:36,551 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1592 transitions. Word has length 34 [2021-12-21 14:39:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:36,551 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1592 transitions. [2021-12-21 14:39:36,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1592 transitions. [2021-12-21 14:39:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 14:39:36,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:36,554 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] [2021-12-21 14:39:36,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:39:36,554 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-12-21 14:39:36,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:36,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847572258] [2021-12-21 14:39:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:36,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:36,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:36,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847572258] [2021-12-21 14:39:36,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847572258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:36,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:36,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:39:36,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784946073] [2021-12-21 14:39:36,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:36,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:39:36,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:39:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:39:36,686 INFO L87 Difference]: Start difference. First operand 845 states and 1592 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:36,814 INFO L93 Difference]: Finished difference Result 903 states and 1681 transitions. [2021-12-21 14:39:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:39:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-21 14:39:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:36,819 INFO L225 Difference]: With dead ends: 903 [2021-12-21 14:39:36,819 INFO L226 Difference]: Without dead ends: 845 [2021-12-21 14:39:36,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:36,821 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 3 mSDsluCounter, 4736 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:36,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6326 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:39:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-21 14:39:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-12-21 14:39:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.8517200474495847) internal successors, (1561), 844 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1561 transitions. [2021-12-21 14:39:36,864 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1561 transitions. Word has length 34 [2021-12-21 14:39:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:36,865 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1561 transitions. [2021-12-21 14:39:36,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1561 transitions. [2021-12-21 14:39:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 14:39:36,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:36,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:36,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:39:36,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash 372994572, now seen corresponding path program 1 times [2021-12-21 14:39:36,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:36,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300584195] [2021-12-21 14:39:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:36,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:37,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:37,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300584195] [2021-12-21 14:39:37,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300584195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:37,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:37,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:39:37,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436852216] [2021-12-21 14:39:37,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:37,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:37,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:37,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:37,015 INFO L87 Difference]: Start difference. First operand 845 states and 1561 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:40,217 INFO L93 Difference]: Finished difference Result 2349 states and 4434 transitions. [2021-12-21 14:39:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:40,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 14:39:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:40,224 INFO L225 Difference]: With dead ends: 2349 [2021-12-21 14:39:40,224 INFO L226 Difference]: Without dead ends: 1596 [2021-12-21 14:39:40,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:40,227 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 876 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:40,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 199 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 14:39:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-12-21 14:39:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1596. [2021-12-21 14:39:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1594 states have (on average 1.8419071518193224) internal successors, (2936), 1595 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2936 transitions. [2021-12-21 14:39:40,261 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2936 transitions. Word has length 61 [2021-12-21 14:39:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:40,261 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2936 transitions. [2021-12-21 14:39:40,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2936 transitions. [2021-12-21 14:39:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 14:39:40,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:40,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:40,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:39:40,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-12-21 14:39:40,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:40,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415463575] [2021-12-21 14:39:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:40,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:40,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:40,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415463575] [2021-12-21 14:39:40,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415463575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:40,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:40,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:40,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334615224] [2021-12-21 14:39:40,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:40,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:40,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:40,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:40,322 INFO L87 Difference]: Start difference. First operand 1596 states and 2936 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:40,350 INFO L93 Difference]: Finished difference Result 1698 states and 3096 transitions. [2021-12-21 14:39:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 14:39:40,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:40,357 INFO L225 Difference]: With dead ends: 1698 [2021-12-21 14:39:40,357 INFO L226 Difference]: Without dead ends: 1644 [2021-12-21 14:39:40,358 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 [2021-12-21 14:39:40,359 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1498 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:40,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1676 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-12-21 14:39:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1642. [2021-12-21 14:39:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1640 states have (on average 1.8347560975609756) internal successors, (3009), 1641 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3009 transitions. [2021-12-21 14:39:40,395 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3009 transitions. Word has length 64 [2021-12-21 14:39:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:40,396 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 3009 transitions. [2021-12-21 14:39:40,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3009 transitions. [2021-12-21 14:39:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 14:39:40,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:40,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:40,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:39:40,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:40,399 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-12-21 14:39:40,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:40,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064234821] [2021-12-21 14:39:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:40,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:40,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:40,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064234821] [2021-12-21 14:39:40,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064234821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:40,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:40,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:40,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030942682] [2021-12-21 14:39:40,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:40,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:40,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:40,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:40,476 INFO L87 Difference]: Start difference. First operand 1642 states and 3009 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:40,676 INFO L93 Difference]: Finished difference Result 2642 states and 4589 transitions. [2021-12-21 14:39:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:39:40,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 14:39:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:40,687 INFO L225 Difference]: With dead ends: 2642 [2021-12-21 14:39:40,687 INFO L226 Difference]: Without dead ends: 2542 [2021-12-21 14:39:40,688 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 [2021-12-21 14:39:40,689 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 8419 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8419 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:40,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8419 Valid, 2463 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:39:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-12-21 14:39:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1740. [2021-12-21 14:39:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1738 states have (on average 1.8193325661680093) internal successors, (3162), 1739 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 3162 transitions. [2021-12-21 14:39:40,737 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 3162 transitions. Word has length 64 [2021-12-21 14:39:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:40,738 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 3162 transitions. [2021-12-21 14:39:40,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 3162 transitions. [2021-12-21 14:39:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:40,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:40,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:40,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:39:40,740 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-12-21 14:39:40,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:40,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842560404] [2021-12-21 14:39:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:40,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:40,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:40,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842560404] [2021-12-21 14:39:40,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842560404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:40,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:40,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:40,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193292191] [2021-12-21 14:39:40,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:40,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:40,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:40,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:40,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:40,788 INFO L87 Difference]: Start difference. First operand 1740 states and 3162 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:40,839 INFO L93 Difference]: Finished difference Result 2114 states and 3746 transitions. [2021-12-21 14:39:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:40,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:40,848 INFO L225 Difference]: With dead ends: 2114 [2021-12-21 14:39:40,848 INFO L226 Difference]: Without dead ends: 1916 [2021-12-21 14:39:40,849 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 [2021-12-21 14:39:40,850 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:40,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1635 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-12-21 14:39:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1910. [2021-12-21 14:39:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 1.7924528301886793) internal successors, (3420), 1909 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3420 transitions. [2021-12-21 14:39:40,944 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3420 transitions. Word has length 66 [2021-12-21 14:39:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:40,944 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3420 transitions. [2021-12-21 14:39:40,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3420 transitions. [2021-12-21 14:39:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:40,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:40,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:40,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:39:40,946 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-12-21 14:39:40,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:40,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811215809] [2021-12-21 14:39:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:40,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:41,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811215809] [2021-12-21 14:39:41,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811215809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:41,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:41,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:41,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461591760] [2021-12-21 14:39:41,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:41,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:41,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:41,159 INFO L87 Difference]: Start difference. First operand 1910 states and 3420 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:41,339 INFO L93 Difference]: Finished difference Result 2280 states and 3990 transitions. [2021-12-21 14:39:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:41,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:41,347 INFO L225 Difference]: With dead ends: 2280 [2021-12-21 14:39:41,347 INFO L226 Difference]: Without dead ends: 1912 [2021-12-21 14:39:41,348 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 [2021-12-21 14:39:41,349 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 7649 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7649 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:41,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7649 Valid, 1893 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-12-21 14:39:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1910. [2021-12-21 14:39:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 1.790356394129979) internal successors, (3416), 1909 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3416 transitions. [2021-12-21 14:39:41,406 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3416 transitions. Word has length 66 [2021-12-21 14:39:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:41,406 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3416 transitions. [2021-12-21 14:39:41,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3416 transitions. [2021-12-21 14:39:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:41,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:41,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:41,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:39:41,408 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:41,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-12-21 14:39:41,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:41,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700359477] [2021-12-21 14:39:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:41,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:41,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:41,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700359477] [2021-12-21 14:39:41,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700359477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:41,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:41,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:41,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597986962] [2021-12-21 14:39:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:41,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:41,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:41,446 INFO L87 Difference]: Start difference. First operand 1910 states and 3416 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:41,514 INFO L93 Difference]: Finished difference Result 2598 states and 4466 transitions. [2021-12-21 14:39:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:41,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:41,524 INFO L225 Difference]: With dead ends: 2598 [2021-12-21 14:39:41,524 INFO L226 Difference]: Without dead ends: 2230 [2021-12-21 14:39:41,526 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 [2021-12-21 14:39:41,527 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1502 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:41,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1686 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-12-21 14:39:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2228. [2021-12-21 14:39:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2226 states have (on average 1.748427672955975) internal successors, (3892), 2227 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 3892 transitions. [2021-12-21 14:39:41,605 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 3892 transitions. Word has length 66 [2021-12-21 14:39:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:41,605 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 3892 transitions. [2021-12-21 14:39:41,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 3892 transitions. [2021-12-21 14:39:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:41,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:41,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:41,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:39:41,610 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-12-21 14:39:41,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:41,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785169440] [2021-12-21 14:39:41,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:41,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:41,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:41,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785169440] [2021-12-21 14:39:41,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785169440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:41,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:41,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:41,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691146778] [2021-12-21 14:39:41,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:41,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:41,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:41,658 INFO L87 Difference]: Start difference. First operand 2228 states and 3892 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:41,758 INFO L93 Difference]: Finished difference Result 3504 states and 5814 transitions. [2021-12-21 14:39:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:41,769 INFO L225 Difference]: With dead ends: 3504 [2021-12-21 14:39:41,769 INFO L226 Difference]: Without dead ends: 2818 [2021-12-21 14:39:41,771 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 [2021-12-21 14:39:41,773 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1506 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:41,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1695 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-12-21 14:39:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2816. [2021-12-21 14:39:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2814 states have (on average 1.6901208244491828) internal successors, (4756), 2815 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4756 transitions. [2021-12-21 14:39:41,891 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4756 transitions. Word has length 66 [2021-12-21 14:39:41,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:41,891 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4756 transitions. [2021-12-21 14:39:41,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4756 transitions. [2021-12-21 14:39:41,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:39:41,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:41,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:41,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:39:41,900 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:41,901 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-12-21 14:39:41,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:41,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123101328] [2021-12-21 14:39:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:41,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:41,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:41,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123101328] [2021-12-21 14:39:41,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123101328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:41,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:41,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:41,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029582570] [2021-12-21 14:39:41,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:41,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:41,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:41,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:41,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:41,970 INFO L87 Difference]: Start difference. First operand 2816 states and 4756 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:42,165 INFO L93 Difference]: Finished difference Result 5172 states and 8246 transitions. [2021-12-21 14:39:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:42,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 14:39:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:42,181 INFO L225 Difference]: With dead ends: 5172 [2021-12-21 14:39:42,181 INFO L226 Difference]: Without dead ends: 3898 [2021-12-21 14:39:42,184 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 [2021-12-21 14:39:42,185 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1510 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:42,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-12-21 14:39:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3896. [2021-12-21 14:39:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3894 states have (on average 1.6199280945043657) internal successors, (6308), 3895 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 6308 transitions. [2021-12-21 14:39:42,420 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 6308 transitions. Word has length 66 [2021-12-21 14:39:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:42,421 INFO L470 AbstractCegarLoop]: Abstraction has 3896 states and 6308 transitions. [2021-12-21 14:39:42,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 6308 transitions. [2021-12-21 14:39:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:39:42,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:42,422 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] [2021-12-21 14:39:42,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:39:42,423 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-12-21 14:39:42,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:42,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439875354] [2021-12-21 14:39:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:42,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:42,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439875354] [2021-12-21 14:39:42,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439875354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:42,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:42,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:39:42,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682712342] [2021-12-21 14:39:42,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:42,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:39:42,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:39:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:39:42,515 INFO L87 Difference]: Start difference. First operand 3896 states and 6308 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:42,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:42,892 INFO L93 Difference]: Finished difference Result 5654 states and 8842 transitions. [2021-12-21 14:39:42,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:42,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-21 14:39:42,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:42,924 INFO L225 Difference]: With dead ends: 5654 [2021-12-21 14:39:42,924 INFO L226 Difference]: Without dead ends: 5652 [2021-12-21 14:39:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:39:42,927 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 225 mSDsluCounter, 4685 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 6291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:42,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 6291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-12-21 14:39:43,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 3992. [2021-12-21 14:39:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3990 states have (on average 1.601002506265664) internal successors, (6388), 3991 states have internal predecessors, (6388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6388 transitions. [2021-12-21 14:39:43,214 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6388 transitions. Word has length 67 [2021-12-21 14:39:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:43,215 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 6388 transitions. [2021-12-21 14:39:43,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6388 transitions. [2021-12-21 14:39:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:39:43,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:43,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:39:43,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:39:43,217 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:43,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-12-21 14:39:43,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:43,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937353668] [2021-12-21 14:39:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:43,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:43,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937353668] [2021-12-21 14:39:43,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937353668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:43,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:43,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:43,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702951293] [2021-12-21 14:39:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:43,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:43,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:43,262 INFO L87 Difference]: Start difference. First operand 3992 states and 6388 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:43,534 INFO L93 Difference]: Finished difference Result 6495 states and 10042 transitions. [2021-12-21 14:39:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:43,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-21 14:39:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:43,546 INFO L225 Difference]: With dead ends: 6495 [2021-12-21 14:39:43,546 INFO L226 Difference]: Without dead ends: 5116 [2021-12-21 14:39:43,550 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 [2021-12-21 14:39:43,551 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 1511 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:43,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1708 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-12-21 14:39:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 5114. [2021-12-21 14:39:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5114 states, 5112 states have (on average 1.5598591549295775) internal successors, (7974), 5113 states have internal predecessors, (7974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7974 transitions. [2021-12-21 14:39:43,875 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7974 transitions. Word has length 68 [2021-12-21 14:39:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:43,875 INFO L470 AbstractCegarLoop]: Abstraction has 5114 states and 7974 transitions. [2021-12-21 14:39:43,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7974 transitions. [2021-12-21 14:39:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:39:43,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:43,878 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:39:43,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:39:43,879 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:43,879 INFO L85 PathProgramCache]: Analyzing trace with hash -482219864, now seen corresponding path program 1 times [2021-12-21 14:39:43,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:43,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96442293] [2021-12-21 14:39:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:43,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:39:43,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96442293] [2021-12-21 14:39:43,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96442293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:43,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:43,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:43,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577014279] [2021-12-21 14:39:43,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:43,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:43,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:43,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:43,960 INFO L87 Difference]: Start difference. First operand 5114 states and 7974 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2021-12-21 14:39:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:45,330 INFO L93 Difference]: Finished difference Result 23686 states and 34572 transitions. [2021-12-21 14:39:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 95 [2021-12-21 14:39:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:45,379 INFO L225 Difference]: With dead ends: 23686 [2021-12-21 14:39:45,379 INFO L226 Difference]: Without dead ends: 20116 [2021-12-21 14:39:45,391 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 [2021-12-21 14:39:45,393 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6643 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6643 SdHoareTripleChecker+Valid, 3571 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:45,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6643 Valid, 3571 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:39:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20116 states. [2021-12-21 14:39:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20116 to 8682. [2021-12-21 14:39:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8682 states, 8680 states have (on average 1.5029953917050691) internal successors, (13046), 8681 states have internal predecessors, (13046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 13046 transitions. [2021-12-21 14:39:46,158 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 13046 transitions. Word has length 95 [2021-12-21 14:39:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:46,159 INFO L470 AbstractCegarLoop]: Abstraction has 8682 states and 13046 transitions. [2021-12-21 14:39:46,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2021-12-21 14:39:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 13046 transitions. [2021-12-21 14:39:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:39:46,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:46,162 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:39:46,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:39:46,163 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:46,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -452697646, now seen corresponding path program 1 times [2021-12-21 14:39:46,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47726123] [2021-12-21 14:39:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:46,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:39:46,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:46,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47726123] [2021-12-21 14:39:46,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47726123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:46,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:46,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:46,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813009114] [2021-12-21 14:39:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:46,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:46,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:46,243 INFO L87 Difference]: Start difference. First operand 8682 states and 13046 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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) [2021-12-21 14:39:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:47,543 INFO L93 Difference]: Finished difference Result 27254 states and 39644 transitions. [2021-12-21 14:39:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:47,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 95 [2021-12-21 14:39:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:47,590 INFO L225 Difference]: With dead ends: 27254 [2021-12-21 14:39:47,591 INFO L226 Difference]: Without dead ends: 23684 [2021-12-21 14:39:47,604 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 [2021-12-21 14:39:47,605 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6531 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6531 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:47,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6531 Valid, 3625 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:39:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23684 states. [2021-12-21 14:39:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23684 to 14042. [2021-12-21 14:39:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14042 states, 14040 states have (on average 1.4682336182336182) internal successors, (20614), 14041 states have internal predecessors, (20614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14042 states to 14042 states and 20614 transitions. [2021-12-21 14:39:48,451 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 20614 transitions. Word has length 95 [2021-12-21 14:39:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:48,451 INFO L470 AbstractCegarLoop]: Abstraction has 14042 states and 20614 transitions. [2021-12-21 14:39:48,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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) [2021-12-21 14:39:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 20614 transitions. [2021-12-21 14:39:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:39:48,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:48,455 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:39:48,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:39:48,456 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash -179009934, now seen corresponding path program 1 times [2021-12-21 14:39:48,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:48,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772664165] [2021-12-21 14:39:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:48,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 14:39:48,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:48,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772664165] [2021-12-21 14:39:48,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772664165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:48,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:48,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:48,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944754044] [2021-12-21 14:39:48,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:48,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:48,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:48,529 INFO L87 Difference]: Start difference. First operand 14042 states and 20614 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 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) [2021-12-21 14:39:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:50,067 INFO L93 Difference]: Finished difference Result 30822 states and 44716 transitions. [2021-12-21 14:39:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 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 95 [2021-12-21 14:39:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:50,122 INFO L225 Difference]: With dead ends: 30822 [2021-12-21 14:39:50,123 INFO L226 Difference]: Without dead ends: 27252 [2021-12-21 14:39:50,137 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 [2021-12-21 14:39:50,138 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6541 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6541 SdHoareTripleChecker+Valid, 3657 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:50,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6541 Valid, 3657 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27252 states. [2021-12-21 14:39:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27252 to 17610. [2021-12-21 14:39:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17610 states, 17608 states have (on average 1.458768741481145) internal successors, (25686), 17609 states have internal predecessors, (25686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17610 states to 17610 states and 25686 transitions. [2021-12-21 14:39:51,225 INFO L78 Accepts]: Start accepts. Automaton has 17610 states and 25686 transitions. Word has length 95 [2021-12-21 14:39:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:51,225 INFO L470 AbstractCegarLoop]: Abstraction has 17610 states and 25686 transitions. [2021-12-21 14:39:51,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 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) [2021-12-21 14:39:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 17610 states and 25686 transitions. [2021-12-21 14:39:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:39:51,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:51,234 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:39:51,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:39:51,235 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1640061714, now seen corresponding path program 1 times [2021-12-21 14:39:51,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:51,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086379941] [2021-12-21 14:39:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:51,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 14:39:51,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:51,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086379941] [2021-12-21 14:39:51,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086379941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:51,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:51,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:51,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347624004] [2021-12-21 14:39:51,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:51,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:51,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:51,315 INFO L87 Difference]: Start difference. First operand 17610 states and 25686 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:53,075 INFO L93 Difference]: Finished difference Result 34390 states and 49788 transitions. [2021-12-21 14:39:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 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 95 [2021-12-21 14:39:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:53,128 INFO L225 Difference]: With dead ends: 34390 [2021-12-21 14:39:53,128 INFO L226 Difference]: Without dead ends: 30820 [2021-12-21 14:39:53,144 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 [2021-12-21 14:39:53,145 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6608 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6608 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:53,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6608 Valid, 3640 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:39:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30820 states. [2021-12-21 14:39:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30820 to 21178. [2021-12-21 14:39:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21178 states, 21176 states have (on average 1.452493388741972) internal successors, (30758), 21177 states have internal predecessors, (30758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21178 states to 21178 states and 30758 transitions. [2021-12-21 14:39:54,765 INFO L78 Accepts]: Start accepts. Automaton has 21178 states and 30758 transitions. Word has length 95 [2021-12-21 14:39:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:54,766 INFO L470 AbstractCegarLoop]: Abstraction has 21178 states and 30758 transitions. [2021-12-21 14:39:54,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 21178 states and 30758 transitions. [2021-12-21 14:39:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 14:39:54,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:54,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-12-21 14:39:54,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:39:54,772 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash -906023264, now seen corresponding path program 1 times [2021-12-21 14:39:54,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:54,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537293241] [2021-12-21 14:39:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:54,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:39:54,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:54,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537293241] [2021-12-21 14:39:54,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537293241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:54,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:54,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:39:54,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694665496] [2021-12-21 14:39:54,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:54,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:39:54,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:54,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:39:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:39:54,816 INFO L87 Difference]: Start difference. First operand 21178 states and 30758 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:55,916 INFO L93 Difference]: Finished difference Result 34940 states and 50508 transitions. [2021-12-21 14:39:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:39:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-21 14:39:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:55,936 INFO L225 Difference]: With dead ends: 34940 [2021-12-21 14:39:55,937 INFO L226 Difference]: Without dead ends: 15306 [2021-12-21 14:39:55,959 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 [2021-12-21 14:39:55,959 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 54 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:55,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3146 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15306 states. [2021-12-21 14:39:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15306 to 15304. [2021-12-21 14:39:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15304 states, 15302 states have (on average 1.465494706574304) internal successors, (22425), 15303 states have internal predecessors, (22425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15304 states to 15304 states and 22425 transitions. [2021-12-21 14:39:56,996 INFO L78 Accepts]: Start accepts. Automaton has 15304 states and 22425 transitions. Word has length 97 [2021-12-21 14:39:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:39:56,996 INFO L470 AbstractCegarLoop]: Abstraction has 15304 states and 22425 transitions. [2021-12-21 14:39:56,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 15304 states and 22425 transitions. [2021-12-21 14:39:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 14:39:57,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:39:57,001 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:39:57,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:39:57,001 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:39:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:39:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -615309075, now seen corresponding path program 1 times [2021-12-21 14:39:57,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:39:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084305975] [2021-12-21 14:39:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:39:57,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:39:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:39:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:39:57,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:39:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084305975] [2021-12-21 14:39:57,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084305975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:39:57,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:39:57,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:39:57,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758474056] [2021-12-21 14:39:57,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:39:57,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:39:57,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:39:57,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:39:57,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:39:57,072 INFO L87 Difference]: Start difference. First operand 15304 states and 22425 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:39:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:39:58,774 INFO L93 Difference]: Finished difference Result 27796 states and 40351 transitions. [2021-12-21 14:39:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:39:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-21 14:39:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:39:58,808 INFO L225 Difference]: With dead ends: 27796 [2021-12-21 14:39:58,808 INFO L226 Difference]: Without dead ends: 25298 [2021-12-21 14:39:58,818 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 [2021-12-21 14:39:58,818 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 6590 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6590 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:39:58,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6590 Valid, 3594 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:39:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25298 states. [2021-12-21 14:40:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25298 to 17800. [2021-12-21 14:40:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17800 states, 17798 states have (on average 1.4595460164063379) internal successors, (25977), 17799 states have internal predecessors, (25977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17800 states to 17800 states and 25977 transitions. [2021-12-21 14:40:00,298 INFO L78 Accepts]: Start accepts. Automaton has 17800 states and 25977 transitions. Word has length 97 [2021-12-21 14:40:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:00,298 INFO L470 AbstractCegarLoop]: Abstraction has 17800 states and 25977 transitions. [2021-12-21 14:40:00,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 17800 states and 25977 transitions. [2021-12-21 14:40:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 14:40:00,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:00,303 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:40:00,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:40:00,304 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash -605888281, now seen corresponding path program 1 times [2021-12-21 14:40:00,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:00,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674453419] [2021-12-21 14:40:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:00,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:00,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:00,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674453419] [2021-12-21 14:40:00,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674453419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:00,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:00,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:40:00,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651632088] [2021-12-21 14:40:00,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:00,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:40:00,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:00,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:40:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:40:00,349 INFO L87 Difference]: Start difference. First operand 17800 states and 25977 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:01,137 INFO L93 Difference]: Finished difference Result 25916 states and 37523 transitions. [2021-12-21 14:40:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:40:01,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-21 14:40:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:01,147 INFO L225 Difference]: With dead ends: 25916 [2021-12-21 14:40:01,147 INFO L226 Difference]: Without dead ends: 9690 [2021-12-21 14:40:01,159 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 [2021-12-21 14:40:01,160 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 48 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:01,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 3131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9690 states. [2021-12-21 14:40:01,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9690 to 9688. [2021-12-21 14:40:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9686 states have (on average 1.4793516415444972) internal successors, (14329), 9687 states have internal predecessors, (14329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 14329 transitions. [2021-12-21 14:40:01,811 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 14329 transitions. Word has length 98 [2021-12-21 14:40:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:01,811 INFO L470 AbstractCegarLoop]: Abstraction has 9688 states and 14329 transitions. [2021-12-21 14:40:01,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 14329 transitions. [2021-12-21 14:40:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 14:40:01,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:01,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:01,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:40:01,815 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1773467421, now seen corresponding path program 1 times [2021-12-21 14:40:01,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:01,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151266170] [2021-12-21 14:40:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:01,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:01,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:01,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151266170] [2021-12-21 14:40:01,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151266170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:01,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:01,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:40:01,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796448203] [2021-12-21 14:40:01,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:01,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:40:01,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:40:01,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:40:01,854 INFO L87 Difference]: Start difference. First operand 9688 states and 14329 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:02,176 INFO L93 Difference]: Finished difference Result 13748 states and 20051 transitions. [2021-12-21 14:40:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:40:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-21 14:40:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:02,184 INFO L225 Difference]: With dead ends: 13748 [2021-12-21 14:40:02,184 INFO L226 Difference]: Without dead ends: 5634 [2021-12-21 14:40:02,190 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 [2021-12-21 14:40:02,191 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 44 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:02,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3116 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-12-21 14:40:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 5632. [2021-12-21 14:40:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5632 states, 5630 states have (on average 1.5198934280639431) internal successors, (8557), 5631 states have internal predecessors, (8557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5632 states to 5632 states and 8557 transitions. [2021-12-21 14:40:02,483 INFO L78 Accepts]: Start accepts. Automaton has 5632 states and 8557 transitions. Word has length 98 [2021-12-21 14:40:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:02,483 INFO L470 AbstractCegarLoop]: Abstraction has 5632 states and 8557 transitions. [2021-12-21 14:40:02,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5632 states and 8557 transitions. [2021-12-21 14:40:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 14:40:02,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:02,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:02,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:40:02,486 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:02,486 INFO L85 PathProgramCache]: Analyzing trace with hash -934897581, now seen corresponding path program 1 times [2021-12-21 14:40:02,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:02,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940503000] [2021-12-21 14:40:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:02,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:02,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:02,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940503000] [2021-12-21 14:40:02,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940503000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:40:02,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:40:02,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:40:02,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408630636] [2021-12-21 14:40:02,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:40:02,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:40:02,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:02,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:40:02,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:40:02,523 INFO L87 Difference]: Start difference. First operand 5632 states and 8557 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:02,704 INFO L93 Difference]: Finished difference Result 7664 states and 11393 transitions. [2021-12-21 14:40:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:40:02,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-21 14:40:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:02,709 INFO L225 Difference]: With dead ends: 7664 [2021-12-21 14:40:02,709 INFO L226 Difference]: Without dead ends: 3606 [2021-12-21 14:40:02,711 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 [2021-12-21 14:40:02,712 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 40 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:02,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3101 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:40:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-12-21 14:40:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3604. [2021-12-21 14:40:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3602 states have (on average 1.5816213214880621) internal successors, (5697), 3603 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 5697 transitions. [2021-12-21 14:40:02,878 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 5697 transitions. Word has length 98 [2021-12-21 14:40:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:02,878 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 5697 transitions. [2021-12-21 14:40:02,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 5697 transitions. [2021-12-21 14:40:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 14:40:02,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:02,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:02,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:40:02,880 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1022016375, now seen corresponding path program 1 times [2021-12-21 14:40:02,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:02,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975949863] [2021-12-21 14:40:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:02,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:03,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:03,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975949863] [2021-12-21 14:40:03,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975949863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:40:03,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192184545] [2021-12-21 14:40:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:03,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:40:03,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:40:03,111 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) [2021-12-21 14:40:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:40:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:03,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 14:40:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:40:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:40:03,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:40:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:40:04,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192184545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:40:04,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:40:04,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-21 14:40:04,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741399674] [2021-12-21 14:40:04,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:40:04,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 14:40:04,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 14:40:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-21 14:40:04,029 INFO L87 Difference]: Start difference. First operand 3604 states and 5697 transitions. Second operand has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:40:08,755 INFO L93 Difference]: Finished difference Result 28780 states and 39881 transitions. [2021-12-21 14:40:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-21 14:40:08,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-21 14:40:08,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:40:08,793 INFO L225 Difference]: With dead ends: 28780 [2021-12-21 14:40:08,793 INFO L226 Difference]: Without dead ends: 26750 [2021-12-21 14:40:08,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-12-21 14:40:08,805 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 19253 mSDsluCounter, 5442 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19253 SdHoareTripleChecker+Valid, 7016 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:40:08,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19253 Valid, 7016 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:40:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26750 states. [2021-12-21 14:40:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26750 to 18851. [2021-12-21 14:40:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18851 states, 18849 states have (on average 1.3678179213751394) internal successors, (25782), 18850 states have internal predecessors, (25782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18851 states to 18851 states and 25782 transitions. [2021-12-21 14:40:10,367 INFO L78 Accepts]: Start accepts. Automaton has 18851 states and 25782 transitions. Word has length 98 [2021-12-21 14:40:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:40:10,367 INFO L470 AbstractCegarLoop]: Abstraction has 18851 states and 25782 transitions. [2021-12-21 14:40:10,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:40:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18851 states and 25782 transitions. [2021-12-21 14:40:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 14:40:10,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:40:10,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:40:10,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 14:40:10,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-21 14:40:10,583 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:40:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:40:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1244176043, now seen corresponding path program 1 times [2021-12-21 14:40:10,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:40:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313242811] [2021-12-21 14:40:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:10,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:40:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:10,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:40:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313242811] [2021-12-21 14:40:10,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313242811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:40:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783431121] [2021-12-21 14:40:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:40:10,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:40:10,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:40:10,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:40:10,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:40:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:40:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 14:40:10,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:40:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:11,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:40:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:40:12,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783431121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:40:12,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:40:12,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2021-12-21 14:40:12,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148937826] [2021-12-21 14:40:12,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:40:12,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 14:40:12,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:40:12,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 14:40:12,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-12-21 14:40:12,530 INFO L87 Difference]: Start difference. First operand 18851 states and 25782 transitions. Second operand has 30 states, 30 states have (on average 8.433333333333334) internal successors, (253), 29 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)