./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86aaf7922fe6f7f87277fe3baca1629811408ccdafec5bb956830ba2f5ff28a9 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:11:07,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:11:07,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:11:07,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:11:07,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:11:07,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:11:07,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:11:07,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:11:07,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:11:07,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:11:07,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:11:07,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:11:07,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:11:07,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:11:07,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:11:07,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:11:07,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:11:07,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:11:07,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:11:07,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:11:07,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:11:07,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:11:07,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:11:07,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:11:07,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:11:07,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:11:07,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:11:07,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:11:07,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:11:07,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:11:07,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:11:07,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:11:07,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:11:07,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:11:07,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:11:07,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:11:07,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:11:07,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:11:07,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:11:07,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:11:07,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:11:07,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:11:07,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:11:07,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:11:07,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:11:07,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:11:07,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:11:07,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:11:07,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:11:07,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:11:07,654 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:11:07,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:11:07,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:11:07,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:11:07,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:11:07,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:11:07,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:11:07,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:11:07,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:11:07,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:11:07,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:11:07,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:11:07,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:11:07,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:11:07,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:11:07,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:11:07,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:11:07,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:11:07,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:11:07,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:11:07,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:11:07,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:11:07,659 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:11:07,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:11:07,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:11:07,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:11:07,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86aaf7922fe6f7f87277fe3baca1629811408ccdafec5bb956830ba2f5ff28a9 [2021-12-16 01:11:07,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:11:07,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:11:07,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:11:07,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:11:07,917 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:11:07,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2021-12-16 01:11:07,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742a42882/5024e049ba554450b6bc1eab7d5c9c87/FLAGfb9e20e28 [2021-12-16 01:11:08,474 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:11:08,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2021-12-16 01:11:08,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742a42882/5024e049ba554450b6bc1eab7d5c9c87/FLAGfb9e20e28 [2021-12-16 01:11:08,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742a42882/5024e049ba554450b6bc1eab7d5c9c87 [2021-12-16 01:11:08,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:11:08,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:11:08,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:11:08,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:11:08,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:11:08,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:11:08" (1/1) ... [2021-12-16 01:11:08,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6348396b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:08, skipping insertion in model container [2021-12-16 01:11:08,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:11:08" (1/1) ... [2021-12-16 01:11:08,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:11:08,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:11:09,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c[28194,28207] [2021-12-16 01:11:09,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:11:09,140 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:11:09,212 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c[28194,28207] [2021-12-16 01:11:09,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:11:09,226 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:11:09,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09 WrapperNode [2021-12-16 01:11:09,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:11:09,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:11:09,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:11:09,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:11:09,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,293 INFO L137 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 951 [2021-12-16 01:11:09,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:11:09,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:11:09,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:11:09,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:11:09,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:11:09,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:11:09,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:11:09,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:11:09,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (1/1) ... [2021-12-16 01:11:09,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:11:09,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:11:09,392 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) [2021-12-16 01:11:09,410 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 [2021-12-16 01:11:09,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:11:09,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:11:09,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:11:09,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:11:09,572 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:11:09,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:11:10,371 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:11:10,379 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:11:10,379 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 01:11:10,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:11:10 BoogieIcfgContainer [2021-12-16 01:11:10,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:11:10,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:11:10,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:11:10,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:11:10,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:11:08" (1/3) ... [2021-12-16 01:11:10,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187811b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:11:10, skipping insertion in model container [2021-12-16 01:11:10,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:11:09" (2/3) ... [2021-12-16 01:11:10,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187811b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:11:10, skipping insertion in model container [2021-12-16 01:11:10,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:11:10" (3/3) ... [2021-12-16 01:11:10,388 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2021-12-16 01:11:10,392 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:11:10,392 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:11:10,430 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:11:10,435 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 [2021-12-16 01:11:10,435 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:11:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 302 states have (on average 1.8079470198675496) internal successors, (546), 303 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 01:11:10,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:10,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:10,463 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:10,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2110216456, now seen corresponding path program 1 times [2021-12-16 01:11:10,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:10,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231067566] [2021-12-16 01:11:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:10,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:10,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231067566] [2021-12-16 01:11:10,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231067566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:10,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:10,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 01:11:10,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71196560] [2021-12-16 01:11:10,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:10,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 01:11:10,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:10,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 01:11:10,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 01:11:10,824 INFO L87 Difference]: Start difference. First operand has 304 states, 302 states have (on average 1.8079470198675496) internal successors, (546), 303 states have internal predecessors, (546), 0 states have call successors, (0), 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 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:10,866 INFO L93 Difference]: Finished difference Result 417 states and 738 transitions. [2021-12-16 01:11:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 01:11:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-16 01:11:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:10,879 INFO L225 Difference]: With dead ends: 417 [2021-12-16 01:11:10,879 INFO L226 Difference]: Without dead ends: 300 [2021-12-16 01:11:10,881 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 [2021-12-16 01:11:10,884 INFO L933 BasicCegarLoop]: 543 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, 543 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 [2021-12-16 01:11:10,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-16 01:11:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-12-16 01:11:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.8026755852842808) internal successors, (539), 299 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 539 transitions. [2021-12-16 01:11:10,929 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 539 transitions. Word has length 77 [2021-12-16 01:11:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:10,930 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 539 transitions. [2021-12-16 01:11:10,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 539 transitions. [2021-12-16 01:11:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 01:11:10,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:10,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:10,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:11:10,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2050737334, now seen corresponding path program 1 times [2021-12-16 01:11:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:10,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412976074] [2021-12-16 01:11:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:10,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:11,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412976074] [2021-12-16 01:11:11,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412976074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:11,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:11,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:11:11,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409531453] [2021-12-16 01:11:11,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:11,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:11:11,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:11,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:11:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:11:11,069 INFO L87 Difference]: Start difference. First operand 300 states and 539 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:11,174 INFO L93 Difference]: Finished difference Result 412 states and 728 transitions. [2021-12-16 01:11:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:11:11,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-16 01:11:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:11,178 INFO L225 Difference]: With dead ends: 412 [2021-12-16 01:11:11,179 INFO L226 Difference]: Without dead ends: 300 [2021-12-16 01:11:11,183 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 [2021-12-16 01:11:11,185 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 3 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:11,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2103 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:11:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-16 01:11:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-12-16 01:11:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.6622073578595318) internal successors, (497), 299 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 497 transitions. [2021-12-16 01:11:11,219 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 497 transitions. Word has length 77 [2021-12-16 01:11:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:11,222 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 497 transitions. [2021-12-16 01:11:11,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 497 transitions. [2021-12-16 01:11:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 01:11:11,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:11,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:11,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:11:11,232 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash 255571390, now seen corresponding path program 1 times [2021-12-16 01:11:11,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:11,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485850274] [2021-12-16 01:11:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:11,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:11,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485850274] [2021-12-16 01:11:11,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485850274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:11,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:11,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:11:11,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231467707] [2021-12-16 01:11:11,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:11,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:11:11,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:11:11,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:11:11,409 INFO L87 Difference]: Start difference. First operand 300 states and 497 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:11,448 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2021-12-16 01:11:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:11:11,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-12-16 01:11:11,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:11,451 INFO L225 Difference]: With dead ends: 505 [2021-12-16 01:11:11,452 INFO L226 Difference]: Without dead ends: 397 [2021-12-16 01:11:11,453 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 [2021-12-16 01:11:11,459 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 156 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:11,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1076 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-16 01:11:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2021-12-16 01:11:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.6624365482233503) internal successors, (655), 394 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 655 transitions. [2021-12-16 01:11:11,489 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 655 transitions. Word has length 118 [2021-12-16 01:11:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:11,491 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 655 transitions. [2021-12-16 01:11:11,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 655 transitions. [2021-12-16 01:11:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 01:11:11,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:11,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:11,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:11:11,497 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:11,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1923540700, now seen corresponding path program 1 times [2021-12-16 01:11:11,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:11,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205056662] [2021-12-16 01:11:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:11,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:11,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:11,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205056662] [2021-12-16 01:11:11,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205056662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:11,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:11,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:11:11,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145964453] [2021-12-16 01:11:11,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:11,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:11:11,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:11:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:11:11,635 INFO L87 Difference]: Start difference. First operand 395 states and 655 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:11,661 INFO L93 Difference]: Finished difference Result 593 states and 993 transitions. [2021-12-16 01:11:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:11:11,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-12-16 01:11:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:11,666 INFO L225 Difference]: With dead ends: 593 [2021-12-16 01:11:11,666 INFO L226 Difference]: Without dead ends: 485 [2021-12-16 01:11:11,667 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 [2021-12-16 01:11:11,669 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 165 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1101 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 [2021-12-16 01:11:11,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1101 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-16 01:11:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 483. [2021-12-16 01:11:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.670124481327801) internal successors, (805), 482 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 805 transitions. [2021-12-16 01:11:11,685 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 805 transitions. Word has length 121 [2021-12-16 01:11:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:11,687 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 805 transitions. [2021-12-16 01:11:11,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 805 transitions. [2021-12-16 01:11:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 01:11:11,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:11,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:11,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:11:11,689 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1109580608, now seen corresponding path program 1 times [2021-12-16 01:11:11,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965557807] [2021-12-16 01:11:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:11,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:11,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:11,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965557807] [2021-12-16 01:11:11,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965557807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:11,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:11,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:11:11,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575821625] [2021-12-16 01:11:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:11,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:11:11,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:11:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:11:11,778 INFO L87 Difference]: Start difference. First operand 483 states and 805 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:11,805 INFO L93 Difference]: Finished difference Result 1034 states and 1736 transitions. [2021-12-16 01:11:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:11:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-12-16 01:11:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:11,809 INFO L225 Difference]: With dead ends: 1034 [2021-12-16 01:11:11,809 INFO L226 Difference]: Without dead ends: 745 [2021-12-16 01:11:11,810 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 [2021-12-16 01:11:11,811 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 157 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:11,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1078 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-12-16 01:11:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2021-12-16 01:11:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.6725067385444743) internal successors, (1241), 742 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1241 transitions. [2021-12-16 01:11:11,845 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1241 transitions. Word has length 121 [2021-12-16 01:11:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:11,846 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1241 transitions. [2021-12-16 01:11:11,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1241 transitions. [2021-12-16 01:11:11,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-16 01:11:11,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:11,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:11,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:11:11,855 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2073181113, now seen corresponding path program 1 times [2021-12-16 01:11:11,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:11,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460905750] [2021-12-16 01:11:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:11,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:11,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460905750] [2021-12-16 01:11:11,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460905750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:11,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:11,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:11:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351979698] [2021-12-16 01:11:11,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:11,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:11:11,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:11:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:11:11,924 INFO L87 Difference]: Start difference. First operand 743 states and 1241 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:11,953 INFO L93 Difference]: Finished difference Result 1274 states and 2138 transitions. [2021-12-16 01:11:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:11:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-16 01:11:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:11,958 INFO L225 Difference]: With dead ends: 1274 [2021-12-16 01:11:11,959 INFO L226 Difference]: Without dead ends: 985 [2021-12-16 01:11:11,959 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 [2021-12-16 01:11:11,961 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 158 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1082 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 [2021-12-16 01:11:11,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1082 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-12-16 01:11:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 983. [2021-12-16 01:11:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 1.6720977596741344) internal successors, (1642), 982 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1642 transitions. [2021-12-16 01:11:11,991 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1642 transitions. Word has length 124 [2021-12-16 01:11:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:11,992 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1642 transitions. [2021-12-16 01:11:11,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1642 transitions. [2021-12-16 01:11:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-16 01:11:11,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:11,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:11,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:11:11,994 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:11,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1914082347, now seen corresponding path program 1 times [2021-12-16 01:11:11,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:11,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733184067] [2021-12-16 01:11:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:11,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:12,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:12,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733184067] [2021-12-16 01:11:12,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733184067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:12,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:12,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:11:12,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765429319] [2021-12-16 01:11:12,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:12,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:11:12,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:11:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:11:12,062 INFO L87 Difference]: Start difference. First operand 983 states and 1642 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:12,099 INFO L93 Difference]: Finished difference Result 2454 states and 4107 transitions. [2021-12-16 01:11:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:11:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-16 01:11:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:12,106 INFO L225 Difference]: With dead ends: 2454 [2021-12-16 01:11:12,106 INFO L226 Difference]: Without dead ends: 1678 [2021-12-16 01:11:12,108 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 [2021-12-16 01:11:12,108 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 150 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:12,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1060 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-12-16 01:11:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1676. [2021-12-16 01:11:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 1.6644776119402984) internal successors, (2788), 1675 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2788 transitions. [2021-12-16 01:11:12,164 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2788 transitions. Word has length 124 [2021-12-16 01:11:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:12,164 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 2788 transitions. [2021-12-16 01:11:12,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2788 transitions. [2021-12-16 01:11:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-16 01:11:12,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:12,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:12,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:11:12,167 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1459354075, now seen corresponding path program 1 times [2021-12-16 01:11:12,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:12,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109704699] [2021-12-16 01:11:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:12,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:12,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:12,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109704699] [2021-12-16 01:11:12,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109704699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:12,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:12,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:11:12,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811088177] [2021-12-16 01:11:12,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:12,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:11:12,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:11:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:11:12,240 INFO L87 Difference]: Start difference. First operand 1676 states and 2788 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:12,276 INFO L93 Difference]: Finished difference Result 3061 states and 5111 transitions. [2021-12-16 01:11:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:11:12,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-16 01:11:12,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:12,284 INFO L225 Difference]: With dead ends: 3061 [2021-12-16 01:11:12,284 INFO L226 Difference]: Without dead ends: 2285 [2021-12-16 01:11:12,286 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 [2021-12-16 01:11:12,286 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 151 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1063 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 [2021-12-16 01:11:12,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1063 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-12-16 01:11:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2021-12-16 01:11:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 1.661262050832603) internal successors, (3791), 2282 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3791 transitions. [2021-12-16 01:11:12,339 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3791 transitions. Word has length 127 [2021-12-16 01:11:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:12,339 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3791 transitions. [2021-12-16 01:11:12,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3791 transitions. [2021-12-16 01:11:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-16 01:11:12,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:12,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:12,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:11:12,342 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1832413193, now seen corresponding path program 1 times [2021-12-16 01:11:12,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:12,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554200181] [2021-12-16 01:11:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:12,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:12,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554200181] [2021-12-16 01:11:12,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554200181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:12,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:12,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:11:12,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18847836] [2021-12-16 01:11:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:12,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:11:12,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:11:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:11:12,411 INFO L87 Difference]: Start difference. First operand 2283 states and 3791 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:12,494 INFO L93 Difference]: Finished difference Result 6166 states and 10210 transitions. [2021-12-16 01:11:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:11:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-16 01:11:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:12,508 INFO L225 Difference]: With dead ends: 6166 [2021-12-16 01:11:12,509 INFO L226 Difference]: Without dead ends: 4103 [2021-12-16 01:11:12,513 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 [2021-12-16 01:11:12,515 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 143 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:12,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1042 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-12-16 01:11:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2021-12-16 01:11:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 4100 states have (on average 1.6446341463414633) internal successors, (6743), 4100 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 6743 transitions. [2021-12-16 01:11:12,622 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 6743 transitions. Word has length 127 [2021-12-16 01:11:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:12,623 INFO L470 AbstractCegarLoop]: Abstraction has 4101 states and 6743 transitions. [2021-12-16 01:11:12,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 6743 transitions. [2021-12-16 01:11:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-16 01:11:12,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:12,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:12,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:11:12,625 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1181394736, now seen corresponding path program 1 times [2021-12-16 01:11:12,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:12,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585654630] [2021-12-16 01:11:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:12,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:12,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:12,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585654630] [2021-12-16 01:11:12,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585654630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:12,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:12,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:11:12,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880952296] [2021-12-16 01:11:12,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:12,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:11:12,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:12,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:11:12,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:11:12,696 INFO L87 Difference]: Start difference. First operand 4101 states and 6743 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:12,810 INFO L93 Difference]: Finished difference Result 7700 states and 12696 transitions. [2021-12-16 01:11:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:11:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-16 01:11:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:12,832 INFO L225 Difference]: With dead ends: 7700 [2021-12-16 01:11:12,832 INFO L226 Difference]: Without dead ends: 5637 [2021-12-16 01:11:12,836 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 [2021-12-16 01:11:12,836 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 144 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1044 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 [2021-12-16 01:11:12,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1044 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2021-12-16 01:11:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 5635. [2021-12-16 01:11:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5635 states, 5634 states have (on average 1.637912673056443) internal successors, (9228), 5634 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 9228 transitions. [2021-12-16 01:11:13,023 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 9228 transitions. Word has length 130 [2021-12-16 01:11:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:13,024 INFO L470 AbstractCegarLoop]: Abstraction has 5635 states and 9228 transitions. [2021-12-16 01:11:13,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 9228 transitions. [2021-12-16 01:11:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-16 01:11:13,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:13,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:13,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:11:13,027 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash -163814164, now seen corresponding path program 1 times [2021-12-16 01:11:13,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140651067] [2021-12-16 01:11:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:13,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:13,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140651067] [2021-12-16 01:11:13,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140651067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:13,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:13,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:11:13,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945011981] [2021-12-16 01:11:13,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:13,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:11:13,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:11:13,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:11:13,123 INFO L87 Difference]: Start difference. First operand 5635 states and 9228 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:13,824 INFO L93 Difference]: Finished difference Result 35981 states and 59438 transitions. [2021-12-16 01:11:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 01:11:13,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-16 01:11:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:13,915 INFO L225 Difference]: With dead ends: 35981 [2021-12-16 01:11:13,916 INFO L226 Difference]: Without dead ends: 30579 [2021-12-16 01:11:13,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:11:13,936 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 1750 mSDsluCounter, 2986 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 3477 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:13,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 3477 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:11:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30579 states. [2021-12-16 01:11:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30579 to 10863. [2021-12-16 01:11:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10863 states, 10862 states have (on average 1.6309151169213774) internal successors, (17715), 10862 states have internal predecessors, (17715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10863 states to 10863 states and 17715 transitions. [2021-12-16 01:11:14,522 INFO L78 Accepts]: Start accepts. Automaton has 10863 states and 17715 transitions. Word has length 130 [2021-12-16 01:11:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:14,523 INFO L470 AbstractCegarLoop]: Abstraction has 10863 states and 17715 transitions. [2021-12-16 01:11:14,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10863 states and 17715 transitions. [2021-12-16 01:11:14,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-16 01:11:14,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:14,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:14,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:11:14,526 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1417088843, now seen corresponding path program 1 times [2021-12-16 01:11:14,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:14,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724037753] [2021-12-16 01:11:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:14,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:14,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:14,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724037753] [2021-12-16 01:11:14,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724037753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:14,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:14,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:11:14,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978647885] [2021-12-16 01:11:14,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:14,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:11:14,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:14,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:11:14,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:11:14,600 INFO L87 Difference]: Start difference. First operand 10863 states and 17715 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:15,230 INFO L93 Difference]: Finished difference Result 35693 states and 58589 transitions. [2021-12-16 01:11:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:11:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-16 01:11:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:15,289 INFO L225 Difference]: With dead ends: 35693 [2021-12-16 01:11:15,289 INFO L226 Difference]: Without dead ends: 25063 [2021-12-16 01:11:15,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:11:15,307 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 531 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:15,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 1467 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25063 states. [2021-12-16 01:11:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25063 to 17908. [2021-12-16 01:11:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17908 states, 17907 states have (on average 1.6314290500921427) internal successors, (29214), 17907 states have internal predecessors, (29214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17908 states to 17908 states and 29214 transitions. [2021-12-16 01:11:16,046 INFO L78 Accepts]: Start accepts. Automaton has 17908 states and 29214 transitions. Word has length 131 [2021-12-16 01:11:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:16,047 INFO L470 AbstractCegarLoop]: Abstraction has 17908 states and 29214 transitions. [2021-12-16 01:11:16,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 17908 states and 29214 transitions. [2021-12-16 01:11:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-16 01:11:16,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:16,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:16,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 01:11:16,049 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash -945521149, now seen corresponding path program 1 times [2021-12-16 01:11:16,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:16,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756639843] [2021-12-16 01:11:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:16,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:16,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:16,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756639843] [2021-12-16 01:11:16,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756639843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:16,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:16,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:11:16,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839500415] [2021-12-16 01:11:16,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:16,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:11:16,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:11:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:11:16,119 INFO L87 Difference]: Start difference. First operand 17908 states and 29214 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:16,999 INFO L93 Difference]: Finished difference Result 58507 states and 95667 transitions. [2021-12-16 01:11:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:11:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-16 01:11:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:17,097 INFO L225 Difference]: With dead ends: 58507 [2021-12-16 01:11:17,098 INFO L226 Difference]: Without dead ends: 40832 [2021-12-16 01:11:17,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:11:17,134 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 529 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:17,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 1603 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40832 states. [2021-12-16 01:11:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40832 to 29281. [2021-12-16 01:11:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29281 states, 29280 states have (on average 1.6251024590163934) internal successors, (47583), 29280 states have internal predecessors, (47583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29281 states to 29281 states and 47583 transitions. [2021-12-16 01:11:18,122 INFO L78 Accepts]: Start accepts. Automaton has 29281 states and 47583 transitions. Word has length 132 [2021-12-16 01:11:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:18,123 INFO L470 AbstractCegarLoop]: Abstraction has 29281 states and 47583 transitions. [2021-12-16 01:11:18,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:18,124 INFO L276 IsEmpty]: Start isEmpty. Operand 29281 states and 47583 transitions. [2021-12-16 01:11:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-16 01:11:18,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:18,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:18,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 01:11:18,126 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1002982526, now seen corresponding path program 1 times [2021-12-16 01:11:18,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66275968] [2021-12-16 01:11:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:18,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:18,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:18,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66275968] [2021-12-16 01:11:18,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66275968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:18,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:18,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:11:18,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899878668] [2021-12-16 01:11:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:18,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:11:18,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:11:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:11:18,201 INFO L87 Difference]: Start difference. First operand 29281 states and 47583 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:19,614 INFO L93 Difference]: Finished difference Result 95313 states and 155241 transitions. [2021-12-16 01:11:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:11:19,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-12-16 01:11:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:19,784 INFO L225 Difference]: With dead ends: 95313 [2021-12-16 01:11:19,784 INFO L226 Difference]: Without dead ends: 66265 [2021-12-16 01:11:19,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:11:19,839 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 527 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:19,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 1599 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66265 states. [2021-12-16 01:11:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66265 to 47630. [2021-12-16 01:11:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47630 states, 47629 states have (on average 1.6187616788091288) internal successors, (77100), 47629 states have internal predecessors, (77100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47630 states to 47630 states and 77100 transitions. [2021-12-16 01:11:21,264 INFO L78 Accepts]: Start accepts. Automaton has 47630 states and 77100 transitions. Word has length 133 [2021-12-16 01:11:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 47630 states and 77100 transitions. [2021-12-16 01:11:21,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 47630 states and 77100 transitions. [2021-12-16 01:11:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-16 01:11:21,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:21,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:21,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 01:11:21,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1679686426, now seen corresponding path program 1 times [2021-12-16 01:11:21,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:21,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740194767] [2021-12-16 01:11:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:21,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:21,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:21,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740194767] [2021-12-16 01:11:21,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740194767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:21,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:21,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:11:21,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644903499] [2021-12-16 01:11:21,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:21,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:11:21,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:21,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:11:21,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:11:21,335 INFO L87 Difference]: Start difference. First operand 47630 states and 77100 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:23,159 INFO L93 Difference]: Finished difference Result 153319 states and 248743 transitions. [2021-12-16 01:11:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:11:23,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-16 01:11:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:23,513 INFO L225 Difference]: With dead ends: 153319 [2021-12-16 01:11:23,514 INFO L226 Difference]: Without dead ends: 105922 [2021-12-16 01:11:23,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:11:23,555 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 525 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:23,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1601 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105922 states. [2021-12-16 01:11:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105922 to 76551. [2021-12-16 01:11:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76551 states, 76550 states have (on average 1.6125538863487916) internal successors, (123441), 76550 states have internal predecessors, (123441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76551 states to 76551 states and 123441 transitions. [2021-12-16 01:11:25,564 INFO L78 Accepts]: Start accepts. Automaton has 76551 states and 123441 transitions. Word has length 134 [2021-12-16 01:11:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:25,564 INFO L470 AbstractCegarLoop]: Abstraction has 76551 states and 123441 transitions. [2021-12-16 01:11:25,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 76551 states and 123441 transitions. [2021-12-16 01:11:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-16 01:11:25,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:25,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:25,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 01:11:25,566 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:25,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1349768178, now seen corresponding path program 1 times [2021-12-16 01:11:25,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:25,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774099478] [2021-12-16 01:11:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:25,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:25,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774099478] [2021-12-16 01:11:25,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774099478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:25,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:25,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:11:25,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311100003] [2021-12-16 01:11:25,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:25,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:11:25,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:11:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:11:25,712 INFO L87 Difference]: Start difference. First operand 76551 states and 123441 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:27,429 INFO L93 Difference]: Finished difference Result 152871 states and 246512 transitions. [2021-12-16 01:11:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:11:27,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-16 01:11:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:27,611 INFO L225 Difference]: With dead ends: 152871 [2021-12-16 01:11:27,611 INFO L226 Difference]: Without dead ends: 76553 [2021-12-16 01:11:27,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:11:27,704 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 290 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:27,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 2334 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:11:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76553 states. [2021-12-16 01:11:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76553 to 76551. [2021-12-16 01:11:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76551 states, 76550 states have (on average 1.604389288047028) internal successors, (122816), 76550 states have internal predecessors, (122816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76551 states to 76551 states and 122816 transitions. [2021-12-16 01:11:29,520 INFO L78 Accepts]: Start accepts. Automaton has 76551 states and 122816 transitions. Word has length 136 [2021-12-16 01:11:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:29,521 INFO L470 AbstractCegarLoop]: Abstraction has 76551 states and 122816 transitions. [2021-12-16 01:11:29,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:29,521 INFO L276 IsEmpty]: Start isEmpty. Operand 76551 states and 122816 transitions. [2021-12-16 01:11:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-16 01:11:29,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:29,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:29,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 01:11:29,523 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash 412618117, now seen corresponding path program 1 times [2021-12-16 01:11:29,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:29,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409589053] [2021-12-16 01:11:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:29,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:29,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409589053] [2021-12-16 01:11:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409589053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:29,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:29,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:11:29,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310786646] [2021-12-16 01:11:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:29,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:11:29,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:11:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:11:29,642 INFO L87 Difference]: Start difference. First operand 76551 states and 122816 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:32,305 INFO L93 Difference]: Finished difference Result 223797 states and 359508 transitions. [2021-12-16 01:11:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:11:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-12-16 01:11:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:32,559 INFO L225 Difference]: With dead ends: 223797 [2021-12-16 01:11:32,559 INFO L226 Difference]: Without dead ends: 147479 [2021-12-16 01:11:32,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:11:32,614 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 426 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:32,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 1886 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147479 states. [2021-12-16 01:11:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147479 to 147477. [2021-12-16 01:11:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147477 states, 147476 states have (on average 1.5937847514171797) internal successors, (235045), 147476 states have internal predecessors, (235045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147477 states to 147477 states and 235045 transitions. [2021-12-16 01:11:36,288 INFO L78 Accepts]: Start accepts. Automaton has 147477 states and 235045 transitions. Word has length 139 [2021-12-16 01:11:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:36,288 INFO L470 AbstractCegarLoop]: Abstraction has 147477 states and 235045 transitions. [2021-12-16 01:11:36,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 147477 states and 235045 transitions. [2021-12-16 01:11:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-16 01:11:36,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:36,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:36,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 01:11:36,291 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:36,291 INFO L85 PathProgramCache]: Analyzing trace with hash -525085605, now seen corresponding path program 1 times [2021-12-16 01:11:36,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:36,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676560597] [2021-12-16 01:11:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:36,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:11:36,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:36,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676560597] [2021-12-16 01:11:36,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676560597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:36,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:36,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 01:11:36,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022568698] [2021-12-16 01:11:36,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:36,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 01:11:36,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:36,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 01:11:36,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:11:36,427 INFO L87 Difference]: Start difference. First operand 147477 states and 235045 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:11:42,026 INFO L93 Difference]: Finished difference Result 285915 states and 451594 transitions. [2021-12-16 01:11:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:11:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-16 01:11:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:11:42,553 INFO L225 Difference]: With dead ends: 285915 [2021-12-16 01:11:42,554 INFO L226 Difference]: Without dead ends: 285913 [2021-12-16 01:11:42,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-16 01:11:42,631 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1336 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:11:42,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1336 Valid, 2989 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:11:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285913 states. [2021-12-16 01:11:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285913 to 153285. [2021-12-16 01:11:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153285 states, 153284 states have (on average 1.5711098353383262) internal successors, (240826), 153284 states have internal predecessors, (240826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153285 states to 153285 states and 240826 transitions. [2021-12-16 01:11:47,945 INFO L78 Accepts]: Start accepts. Automaton has 153285 states and 240826 transitions. Word has length 140 [2021-12-16 01:11:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:11:47,945 INFO L470 AbstractCegarLoop]: Abstraction has 153285 states and 240826 transitions. [2021-12-16 01:11:47,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:11:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 153285 states and 240826 transitions. [2021-12-16 01:11:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-16 01:11:47,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:11:47,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:11:47,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 01:11:47,954 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:11:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:11:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash 304969072, now seen corresponding path program 1 times [2021-12-16 01:11:47,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:11:47,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734013713] [2021-12-16 01:11:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:11:47,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:11:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:11:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:11:48,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:11:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734013713] [2021-12-16 01:11:48,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734013713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:11:48,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:11:48,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:11:48,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906651870] [2021-12-16 01:11:48,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:11:48,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:11:48,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:11:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:11:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:11:48,057 INFO L87 Difference]: Start difference. First operand 153285 states and 240826 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)