./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.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 17ba764d4851428799f2c4794a4662e2753aae472d291b23839dac79bbfbab6d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:09:39,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:09:39,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:09:39,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:09:39,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:09:39,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:09:39,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:09:39,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:09:39,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:09:39,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:09:39,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:09:39,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:09:39,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:09:39,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:09:39,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:09:39,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:09:39,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:09:39,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:09:39,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:09:39,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:09:39,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:09:39,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:09:39,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:09:39,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:09:39,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:09:39,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:09:39,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:09:39,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:09:39,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:09:39,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:09:39,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:09:39,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:09:39,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:09:39,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:09:39,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:09:39,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:09:39,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:09:39,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:09:39,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:09:39,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:09:39,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:09:39,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:09:39,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:09:39,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:09:39,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:09:39,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:09:39,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:09:39,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:09:39,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:09:39,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:09:39,838 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:09:39,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:09:39,838 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:09:39,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:09:39,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:09:39,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:09:39,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:09:39,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:09:39,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:09:39,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:09:39,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:09:39,840 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:09:39,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:09:39,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:09:39,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:09:39,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:09:39,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:39,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:09:39,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:09:39,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:09:39,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:09:39,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:09:39,842 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:09:39,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:09:39,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:09:39,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17ba764d4851428799f2c4794a4662e2753aae472d291b23839dac79bbfbab6d [2021-12-28 01:09:40,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:09:40,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:09:40,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:09:40,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:09:40,152 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:09:40,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-28 01:09:40,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5286208/46c82e33fd3544d5be07bd764aaa1b59/FLAG1b14ae63a [2021-12-28 01:09:40,662 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:09:40,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-28 01:09:40,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5286208/46c82e33fd3544d5be07bd764aaa1b59/FLAG1b14ae63a [2021-12-28 01:09:41,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5286208/46c82e33fd3544d5be07bd764aaa1b59 [2021-12-28 01:09:41,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:09:41,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:09:41,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:41,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:09:41,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:09:41,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371ae673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41, skipping insertion in model container [2021-12-28 01:09:41,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:09:41,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:09:41,351 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c[9392,9405] [2021-12-28 01:09:41,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:41,362 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:09:41,448 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c[9392,9405] [2021-12-28 01:09:41,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:41,471 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:09:41,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41 WrapperNode [2021-12-28 01:09:41,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:41,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:41,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:09:41,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:09:41,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,536 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 319 [2021-12-28 01:09:41,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:41,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:09:41,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:09:41,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:09:41,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:09:41,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:09:41,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:09:41,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:09:41,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (1/1) ... [2021-12-28 01:09:41,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:41,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:41,624 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) [2021-12-28 01:09:41,642 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 [2021-12-28 01:09:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:09:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:09:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:09:41,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:09:41,776 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:09:41,778 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:09:42,200 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:09:42,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:09:42,206 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:09:42,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:42 BoogieIcfgContainer [2021-12-28 01:09:42,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:09:42,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:09:42,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:09:42,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:09:42,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:09:41" (1/3) ... [2021-12-28 01:09:42,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65293ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:42, skipping insertion in model container [2021-12-28 01:09:42,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:41" (2/3) ... [2021-12-28 01:09:42,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65293ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:42, skipping insertion in model container [2021-12-28 01:09:42,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:42" (3/3) ... [2021-12-28 01:09:42,217 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-28 01:09:42,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:09:42,222 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:09:42,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:09:42,264 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 [2021-12-28 01:09:42,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:09:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 01:09:42,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:42,285 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] [2021-12-28 01:09:42,286 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2019613380, now seen corresponding path program 1 times [2021-12-28 01:09:42,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026220709] [2021-12-28 01:09:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:42,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:42,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:42,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026220709] [2021-12-28 01:09:42,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026220709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:42,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:42,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:09:42,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530317733] [2021-12-28 01:09:42,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:42,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:09:42,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:09:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:09:42,499 INFO L87 Difference]: Start difference. First operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:42,528 INFO L93 Difference]: Finished difference Result 171 states and 278 transitions. [2021-12-28 01:09:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:09:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-28 01:09:42,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:42,543 INFO L225 Difference]: With dead ends: 171 [2021-12-28 01:09:42,543 INFO L226 Difference]: Without dead ends: 96 [2021-12-28 01:09:42,546 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 [2021-12-28 01:09:42,549 INFO L933 BasicCegarLoop]: 163 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, 163 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 [2021-12-28 01:09:42,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-28 01:09:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-28 01:09:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 95 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2021-12-28 01:09:42,592 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 29 [2021-12-28 01:09:42,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:42,593 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2021-12-28 01:09:42,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2021-12-28 01:09:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 01:09:42,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:42,597 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] [2021-12-28 01:09:42,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:09:42,598 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2141340410, now seen corresponding path program 1 times [2021-12-28 01:09:42,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:42,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130668904] [2021-12-28 01:09:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:42,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:42,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130668904] [2021-12-28 01:09:42,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130668904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:42,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:42,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:42,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422108026] [2021-12-28 01:09:42,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:42,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:42,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:42,727 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:42,836 INFO L93 Difference]: Finished difference Result 232 states and 373 transitions. [2021-12-28 01:09:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:42,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-28 01:09:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:42,838 INFO L225 Difference]: With dead ends: 232 [2021-12-28 01:09:42,839 INFO L226 Difference]: Without dead ends: 162 [2021-12-28 01:09:42,841 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 [2021-12-28 01:09:42,842 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 107 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:42,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 591 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-28 01:09:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-12-28 01:09:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 95 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2021-12-28 01:09:42,853 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 29 [2021-12-28 01:09:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:42,853 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2021-12-28 01:09:42,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2021-12-28 01:09:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 01:09:42,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:42,855 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] [2021-12-28 01:09:42,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:09:42,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1164590349, now seen corresponding path program 1 times [2021-12-28 01:09:42,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:42,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001341682] [2021-12-28 01:09:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:42,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:42,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001341682] [2021-12-28 01:09:42,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001341682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:42,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:42,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:42,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637439534] [2021-12-28 01:09:42,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:42,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:42,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:42,956 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:42,976 INFO L93 Difference]: Finished difference Result 216 states and 325 transitions. [2021-12-28 01:09:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:42,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-28 01:09:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:42,978 INFO L225 Difference]: With dead ends: 216 [2021-12-28 01:09:42,978 INFO L226 Difference]: Without dead ends: 150 [2021-12-28 01:09:42,979 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 [2021-12-28 01:09:42,980 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 93 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:42,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-28 01:09:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-12-28 01:09:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.4829931972789117) internal successors, (218), 147 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 218 transitions. [2021-12-28 01:09:42,991 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 218 transitions. Word has length 52 [2021-12-28 01:09:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:42,991 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 218 transitions. [2021-12-28 01:09:42,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 218 transitions. [2021-12-28 01:09:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 01:09:42,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:42,993 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] [2021-12-28 01:09:42,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:09:42,994 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash 502679627, now seen corresponding path program 1 times [2021-12-28 01:09:42,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:42,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242826549] [2021-12-28 01:09:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:42,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242826549] [2021-12-28 01:09:43,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242826549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:43,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:43,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:43,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059776988] [2021-12-28 01:09:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:43,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:43,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:43,052 INFO L87 Difference]: Start difference. First operand 148 states and 218 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:43,067 INFO L93 Difference]: Finished difference Result 360 states and 554 transitions. [2021-12-28 01:09:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-28 01:09:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:43,069 INFO L225 Difference]: With dead ends: 360 [2021-12-28 01:09:43,069 INFO L226 Difference]: Without dead ends: 242 [2021-12-28 01:09:43,070 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 [2021-12-28 01:09:43,071 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 88 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 303 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 [2021-12-28 01:09:43,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 303 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:43,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-28 01:09:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2021-12-28 01:09:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.5188284518828452) internal successors, (363), 239 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2021-12-28 01:09:43,086 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 53 [2021-12-28 01:09:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:43,087 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2021-12-28 01:09:43,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2021-12-28 01:09:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 01:09:43,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:43,088 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] [2021-12-28 01:09:43,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:09:43,089 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1405286019, now seen corresponding path program 1 times [2021-12-28 01:09:43,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:43,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065580643] [2021-12-28 01:09:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:43,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065580643] [2021-12-28 01:09:43,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065580643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:43,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:43,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:43,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632873288] [2021-12-28 01:09:43,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:43,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:43,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:43,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:43,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:43,164 INFO L87 Difference]: Start difference. First operand 240 states and 363 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:43,183 INFO L93 Difference]: Finished difference Result 612 states and 949 transitions. [2021-12-28 01:09:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-28 01:09:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:43,187 INFO L225 Difference]: With dead ends: 612 [2021-12-28 01:09:43,187 INFO L226 Difference]: Without dead ends: 402 [2021-12-28 01:09:43,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:43,191 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 83 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 294 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 [2021-12-28 01:09:43,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 294 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-28 01:09:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2021-12-28 01:09:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.531328320802005) internal successors, (611), 399 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 611 transitions. [2021-12-28 01:09:43,214 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 611 transitions. Word has length 54 [2021-12-28 01:09:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:43,215 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 611 transitions. [2021-12-28 01:09:43,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 611 transitions. [2021-12-28 01:09:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-28 01:09:43,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:43,216 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] [2021-12-28 01:09:43,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:09:43,217 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:43,218 INFO L85 PathProgramCache]: Analyzing trace with hash 417554395, now seen corresponding path program 1 times [2021-12-28 01:09:43,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:43,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939678375] [2021-12-28 01:09:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:43,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:43,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939678375] [2021-12-28 01:09:43,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939678375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:43,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:43,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:43,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126041190] [2021-12-28 01:09:43,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:43,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:43,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:43,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:43,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:43,266 INFO L87 Difference]: Start difference. First operand 400 states and 611 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:43,294 INFO L93 Difference]: Finished difference Result 1044 states and 1613 transitions. [2021-12-28 01:09:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:43,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-28 01:09:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:43,297 INFO L225 Difference]: With dead ends: 1044 [2021-12-28 01:09:43,298 INFO L226 Difference]: Without dead ends: 674 [2021-12-28 01:09:43,298 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 [2021-12-28 01:09:43,299 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 285 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 [2021-12-28 01:09:43,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 285 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-28 01:09:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2021-12-28 01:09:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.5245901639344261) internal successors, (1023), 671 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1023 transitions. [2021-12-28 01:09:43,331 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1023 transitions. Word has length 55 [2021-12-28 01:09:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:43,332 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1023 transitions. [2021-12-28 01:09:43,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1023 transitions. [2021-12-28 01:09:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 01:09:43,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:43,334 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] [2021-12-28 01:09:43,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:09:43,334 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:43,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash -368690669, now seen corresponding path program 1 times [2021-12-28 01:09:43,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:43,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602776963] [2021-12-28 01:09:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:43,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:43,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602776963] [2021-12-28 01:09:43,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602776963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:43,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:43,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:43,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907551104] [2021-12-28 01:09:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:43,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:43,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:43,404 INFO L87 Difference]: Start difference. First operand 672 states and 1023 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:43,605 INFO L93 Difference]: Finished difference Result 3882 states and 5988 transitions. [2021-12-28 01:09:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-28 01:09:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:43,618 INFO L225 Difference]: With dead ends: 3882 [2021-12-28 01:09:43,618 INFO L226 Difference]: Without dead ends: 3240 [2021-12-28 01:09:43,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:09:43,620 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 839 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:43,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1028 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-12-28 01:09:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1312. [2021-12-28 01:09:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.5125858123569793) internal successors, (1983), 1311 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1983 transitions. [2021-12-28 01:09:43,717 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1983 transitions. Word has length 56 [2021-12-28 01:09:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:43,717 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1983 transitions. [2021-12-28 01:09:43,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1983 transitions. [2021-12-28 01:09:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:09:43,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:43,719 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] [2021-12-28 01:09:43,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:09:43,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:43,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1072167829, now seen corresponding path program 1 times [2021-12-28 01:09:43,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:43,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635044006] [2021-12-28 01:09:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:43,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:43,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635044006] [2021-12-28 01:09:43,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635044006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:43,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:43,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:43,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944769502] [2021-12-28 01:09:43,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:43,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:43,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:43,816 INFO L87 Difference]: Start difference. First operand 1312 states and 1983 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:44,198 INFO L93 Difference]: Finished difference Result 5864 states and 8803 transitions. [2021-12-28 01:09:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-28 01:09:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:44,216 INFO L225 Difference]: With dead ends: 5864 [2021-12-28 01:09:44,217 INFO L226 Difference]: Without dead ends: 4582 [2021-12-28 01:09:44,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:44,220 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 453 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:44,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 556 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-12-28 01:09:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4576. [2021-12-28 01:09:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 1.4896174863387979) internal successors, (6815), 4575 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6815 transitions. [2021-12-28 01:09:44,551 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6815 transitions. Word has length 57 [2021-12-28 01:09:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:44,552 INFO L470 AbstractCegarLoop]: Abstraction has 4576 states and 6815 transitions. [2021-12-28 01:09:44,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6815 transitions. [2021-12-28 01:09:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-28 01:09:44,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:44,553 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] [2021-12-28 01:09:44,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:09:44,554 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1541080392, now seen corresponding path program 1 times [2021-12-28 01:09:44,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:44,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878811504] [2021-12-28 01:09:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:44,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:44,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:44,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878811504] [2021-12-28 01:09:44,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878811504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:44,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:44,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:44,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860320994] [2021-12-28 01:09:44,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:44,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:44,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:44,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:44,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:44,615 INFO L87 Difference]: Start difference. First operand 4576 states and 6815 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:45,240 INFO L93 Difference]: Finished difference Result 9634 states and 14112 transitions. [2021-12-28 01:09:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:09:45,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-28 01:09:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:45,272 INFO L225 Difference]: With dead ends: 9634 [2021-12-28 01:09:45,272 INFO L226 Difference]: Without dead ends: 9632 [2021-12-28 01:09:45,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:09:45,275 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 294 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:45,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 588 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-12-28 01:09:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2021-12-28 01:09:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 1.451703972575116) internal successors, (7199), 4959 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7199 transitions. [2021-12-28 01:09:45,679 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7199 transitions. Word has length 58 [2021-12-28 01:09:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:45,679 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 7199 transitions. [2021-12-28 01:09:45,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7199 transitions. [2021-12-28 01:09:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 01:09:45,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:45,681 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] [2021-12-28 01:09:45,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:09:45,681 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 581430488, now seen corresponding path program 1 times [2021-12-28 01:09:45,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:45,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87670204] [2021-12-28 01:09:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:45,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:45,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:45,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87670204] [2021-12-28 01:09:45,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87670204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:45,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:45,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:45,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470657104] [2021-12-28 01:09:45,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:45,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:45,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:45,718 INFO L87 Difference]: Start difference. First operand 4960 states and 7199 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:46,147 INFO L93 Difference]: Finished difference Result 11966 states and 17395 transitions. [2021-12-28 01:09:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-28 01:09:46,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:46,171 INFO L225 Difference]: With dead ends: 11966 [2021-12-28 01:09:46,172 INFO L226 Difference]: Without dead ends: 7036 [2021-12-28 01:09:46,178 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 [2021-12-28 01:09:46,179 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:46,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2021-12-28 01:09:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 7034. [2021-12-28 01:09:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 1.4458979098535476) internal successors, (10169), 7033 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10169 transitions. [2021-12-28 01:09:46,633 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10169 transitions. Word has length 59 [2021-12-28 01:09:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:46,634 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 10169 transitions. [2021-12-28 01:09:46,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10169 transitions. [2021-12-28 01:09:46,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 01:09:46,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:46,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:46,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:09:46,639 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:46,640 INFO L85 PathProgramCache]: Analyzing trace with hash 418253800, now seen corresponding path program 1 times [2021-12-28 01:09:46,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:46,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856381961] [2021-12-28 01:09:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:46,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:46,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856381961] [2021-12-28 01:09:46,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856381961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901280884] [2021-12-28 01:09:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:46,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:46,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:09:46,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:09:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:46,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 01:09:46,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:47,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:47,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901280884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:47,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:47,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2021-12-28 01:09:47,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645635843] [2021-12-28 01:09:47,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:47,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:09:47,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:09:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:09:47,543 INFO L87 Difference]: Start difference. First operand 7034 states and 10169 transitions. Second operand has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:48,907 INFO L93 Difference]: Finished difference Result 26408 states and 38489 transitions. [2021-12-28 01:09:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:09:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-28 01:09:48,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:48,956 INFO L225 Difference]: With dead ends: 26408 [2021-12-28 01:09:48,956 INFO L226 Difference]: Without dead ends: 21478 [2021-12-28 01:09:48,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-12-28 01:09:48,972 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 935 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:48,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 1187 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21478 states. [2021-12-28 01:09:50,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21478 to 20634. [2021-12-28 01:09:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20634 states, 20633 states have (on average 1.4389085445645327) internal successors, (29689), 20633 states have internal predecessors, (29689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20634 states to 20634 states and 29689 transitions. [2021-12-28 01:09:50,220 INFO L78 Accepts]: Start accepts. Automaton has 20634 states and 29689 transitions. Word has length 82 [2021-12-28 01:09:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:50,221 INFO L470 AbstractCegarLoop]: Abstraction has 20634 states and 29689 transitions. [2021-12-28 01:09:50,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 20634 states and 29689 transitions. [2021-12-28 01:09:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 01:09:50,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:50,226 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] [2021-12-28 01:09:50,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 01:09:50,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-28 01:09:50,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1896856622, now seen corresponding path program 1 times [2021-12-28 01:09:50,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:50,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745697755] [2021-12-28 01:09:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:50,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:50,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745697755] [2021-12-28 01:09:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745697755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:50,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:50,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:50,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879602431] [2021-12-28 01:09:50,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:50,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:50,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:50,504 INFO L87 Difference]: Start difference. First operand 20634 states and 29689 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:52,218 INFO L93 Difference]: Finished difference Result 44764 states and 64742 transitions. [2021-12-28 01:09:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:52,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-28 01:09:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:52,301 INFO L225 Difference]: With dead ends: 44764 [2021-12-28 01:09:52,301 INFO L226 Difference]: Without dead ends: 36086 [2021-12-28 01:09:52,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:09:52,329 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 660 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:52,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 891 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36086 states. [2021-12-28 01:09:53,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36086 to 27402. [2021-12-28 01:09:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27402 states, 27401 states have (on average 1.434436699390533) internal successors, (39305), 27401 states have internal predecessors, (39305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27402 states to 27402 states and 39305 transitions. [2021-12-28 01:09:53,987 INFO L78 Accepts]: Start accepts. Automaton has 27402 states and 39305 transitions. Word has length 83 [2021-12-28 01:09:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:53,988 INFO L470 AbstractCegarLoop]: Abstraction has 27402 states and 39305 transitions. [2021-12-28 01:09:53,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27402 states and 39305 transitions. [2021-12-28 01:09:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 01:09:53,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:53,994 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] [2021-12-28 01:09:53,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:09:53,995 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1918927774, now seen corresponding path program 1 times [2021-12-28 01:09:53,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:53,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830328241] [2021-12-28 01:09:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:53,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:54,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830328241] [2021-12-28 01:09:54,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830328241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:54,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:54,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:54,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023361982] [2021-12-28 01:09:54,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:54,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:54,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:54,033 INFO L87 Difference]: Start difference. First operand 27402 states and 39305 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:56,091 INFO L93 Difference]: Finished difference Result 67249 states and 96337 transitions. [2021-12-28 01:09:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-28 01:09:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:56,159 INFO L225 Difference]: With dead ends: 67249 [2021-12-28 01:09:56,159 INFO L226 Difference]: Without dead ends: 44207 [2021-12-28 01:09:56,185 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 [2021-12-28 01:09:56,186 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 69 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:56,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 272 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44207 states. [2021-12-28 01:09:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44207 to 42477. [2021-12-28 01:09:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42477 states, 42476 states have (on average 1.4172473867595818) internal successors, (60199), 42476 states have internal predecessors, (60199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42477 states to 42477 states and 60199 transitions. [2021-12-28 01:09:58,578 INFO L78 Accepts]: Start accepts. Automaton has 42477 states and 60199 transitions. Word has length 83 [2021-12-28 01:09:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:58,578 INFO L470 AbstractCegarLoop]: Abstraction has 42477 states and 60199 transitions. [2021-12-28 01:09:58,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 42477 states and 60199 transitions. [2021-12-28 01:09:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 01:09:58,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:58,588 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] [2021-12-28 01:09:58,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:09:58,589 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1322927490, now seen corresponding path program 1 times [2021-12-28 01:09:58,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044743004] [2021-12-28 01:09:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:58,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:58,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:58,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044743004] [2021-12-28 01:09:58,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044743004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:58,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:58,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:58,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194554314] [2021-12-28 01:09:58,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:58,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:58,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:58,640 INFO L87 Difference]: Start difference. First operand 42477 states and 60199 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:01,012 INFO L93 Difference]: Finished difference Result 66562 states and 93995 transitions. [2021-12-28 01:10:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:01,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-28 01:10:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:01,089 INFO L225 Difference]: With dead ends: 66562 [2021-12-28 01:10:01,089 INFO L226 Difference]: Without dead ends: 43824 [2021-12-28 01:10:01,123 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 [2021-12-28 01:10:01,124 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 71 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:01,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 298 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43824 states. [2021-12-28 01:10:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43824 to 42568. [2021-12-28 01:10:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42568 states, 42567 states have (on average 1.3918293513754787) internal successors, (59246), 42567 states have internal predecessors, (59246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42568 states to 42568 states and 59246 transitions. [2021-12-28 01:10:03,475 INFO L78 Accepts]: Start accepts. Automaton has 42568 states and 59246 transitions. Word has length 83 [2021-12-28 01:10:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:03,475 INFO L470 AbstractCegarLoop]: Abstraction has 42568 states and 59246 transitions. [2021-12-28 01:10:03,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 42568 states and 59246 transitions. [2021-12-28 01:10:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 01:10:03,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:03,483 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] [2021-12-28 01:10:03,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:10:03,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash 895581426, now seen corresponding path program 1 times [2021-12-28 01:10:03,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:03,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666227463] [2021-12-28 01:10:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:03,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:03,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666227463] [2021-12-28 01:10:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666227463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:03,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:03,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:03,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244656397] [2021-12-28 01:10:03,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:03,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:03,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:03,539 INFO L87 Difference]: Start difference. First operand 42568 states and 59246 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:06,554 INFO L93 Difference]: Finished difference Result 91626 states and 127103 transitions. [2021-12-28 01:10:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:06,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-28 01:10:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:06,650 INFO L225 Difference]: With dead ends: 91626 [2021-12-28 01:10:06,651 INFO L226 Difference]: Without dead ends: 58248 [2021-12-28 01:10:06,682 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 [2021-12-28 01:10:06,683 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 70 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:06,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 285 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:06,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58248 states. [2021-12-28 01:10:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58248 to 57217. [2021-12-28 01:10:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57217 states, 57216 states have (on average 1.3692149049217002) internal successors, (78341), 57216 states have internal predecessors, (78341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57217 states to 57217 states and 78341 transitions. [2021-12-28 01:10:09,781 INFO L78 Accepts]: Start accepts. Automaton has 57217 states and 78341 transitions. Word has length 83 [2021-12-28 01:10:09,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:09,781 INFO L470 AbstractCegarLoop]: Abstraction has 57217 states and 78341 transitions. [2021-12-28 01:10:09,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 57217 states and 78341 transitions. [2021-12-28 01:10:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 01:10:09,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:09,789 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] [2021-12-28 01:10:09,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:10:09,790 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:09,790 INFO L85 PathProgramCache]: Analyzing trace with hash -679069464, now seen corresponding path program 1 times [2021-12-28 01:10:09,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:09,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356169247] [2021-12-28 01:10:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:09,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:10:09,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:09,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356169247] [2021-12-28 01:10:09,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356169247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:09,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:09,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:10:09,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590157695] [2021-12-28 01:10:09,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:09,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:10:09,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:10:09,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:10:09,854 INFO L87 Difference]: Start difference. First operand 57217 states and 78341 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:14,225 INFO L93 Difference]: Finished difference Result 111218 states and 153817 transitions. [2021-12-28 01:10:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:10:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-28 01:10:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:14,393 INFO L225 Difference]: With dead ends: 111218 [2021-12-28 01:10:14,393 INFO L226 Difference]: Without dead ends: 100464 [2021-12-28 01:10:14,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:10:14,434 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 668 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:14,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 822 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100464 states. [2021-12-28 01:10:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100464 to 67297. [2021-12-28 01:10:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67297 states, 67296 states have (on average 1.3704975035663338) internal successors, (92229), 67296 states have internal predecessors, (92229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67297 states to 67297 states and 92229 transitions. [2021-12-28 01:10:18,059 INFO L78 Accepts]: Start accepts. Automaton has 67297 states and 92229 transitions. Word has length 83 [2021-12-28 01:10:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:18,059 INFO L470 AbstractCegarLoop]: Abstraction has 67297 states and 92229 transitions. [2021-12-28 01:10:18,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 67297 states and 92229 transitions. [2021-12-28 01:10:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 01:10:18,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:18,067 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] [2021-12-28 01:10:18,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:10:18,068 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:18,069 INFO L85 PathProgramCache]: Analyzing trace with hash 576343346, now seen corresponding path program 1 times [2021-12-28 01:10:18,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:18,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114832627] [2021-12-28 01:10:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:18,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 01:10:18,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:18,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114832627] [2021-12-28 01:10:18,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114832627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:18,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:18,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:10:18,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445524685] [2021-12-28 01:10:18,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:18,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:10:18,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:10:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:10:18,162 INFO L87 Difference]: Start difference. First operand 67297 states and 92229 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)