./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label49.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label49.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 e2ce90b08f9dc9315f13f0d8408b309f0856f833532caca0391f68d5a9cb9786 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:33:37,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:33:37,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:33:37,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:33:37,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:33:37,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:33:37,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:33:37,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:33:37,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:33:37,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:33:37,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:33:37,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:33:37,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:33:37,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:33:37,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:33:37,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:33:37,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:33:37,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:33:37,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:33:37,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:33:37,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:33:37,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:33:37,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:33:37,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:33:37,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:33:37,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:33:37,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:33:37,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:33:37,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:33:37,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:33:37,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:33:37,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:33:37,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:33:37,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:33:37,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:33:37,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:33:37,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:33:37,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:33:37,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:33:37,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:33:37,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:33:37,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:33:37,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:33:37,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:33:37,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:33:37,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:33:37,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:33:37,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:33:37,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:33:37,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:33:37,885 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:33:37,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:33:37,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:33:37,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:33:37,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:33:37,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:33:37,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:33:37,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:33:37,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:33:37,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:33:37,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:33:37,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:33:37,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:33:37,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:33:37,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:33:37,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:33:37,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:33:37,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:33:37,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:33:37,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:33:37,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:33:37,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:33:37,889 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:33:37,889 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:33:37,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:33:37,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:33:37,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2ce90b08f9dc9315f13f0d8408b309f0856f833532caca0391f68d5a9cb9786 [2021-12-17 03:33:38,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:33:38,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:33:38,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:33:38,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:33:38,110 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:33:38,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label49.c [2021-12-17 03:33:38,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15864bf56/29a3520ff4ce43c987185eb0383cd8d8/FLAG99c45c65b [2021-12-17 03:33:38,613 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:33:38,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label49.c [2021-12-17 03:33:38,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15864bf56/29a3520ff4ce43c987185eb0383cd8d8/FLAG99c45c65b [2021-12-17 03:33:38,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15864bf56/29a3520ff4ce43c987185eb0383cd8d8 [2021-12-17 03:33:38,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:33:38,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:33:38,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:33:38,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:33:38,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:33:38,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:33:38" (1/1) ... [2021-12-17 03:33:38,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b16bde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:38, skipping insertion in model container [2021-12-17 03:33:38,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:33:38" (1/1) ... [2021-12-17 03:33:38,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:33:38,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:33:39,362 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/eca-rers2012/Problem03_label49.c[56899,56912] [2021-12-17 03:33:39,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:33:39,400 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:33:39,527 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/eca-rers2012/Problem03_label49.c[56899,56912] [2021-12-17 03:33:39,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:33:39,552 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:33:39,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39 WrapperNode [2021-12-17 03:33:39,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:33:39,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:33:39,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:33:39,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:33:39,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,649 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-17 03:33:39,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:33:39,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:33:39,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:33:39,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:33:39,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:33:39,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:33:39,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:33:39,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:33:39,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (1/1) ... [2021-12-17 03:33:39,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:33:39,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:39,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:33:39,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:33:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:33:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:33:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:33:39,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:33:39,905 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:33:39,907 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:33:41,006 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:33:41,019 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:33:41,019 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:33:41,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:33:41 BoogieIcfgContainer [2021-12-17 03:33:41,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:33:41,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:33:41,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:33:41,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:33:41,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:33:38" (1/3) ... [2021-12-17 03:33:41,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbafff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:33:41, skipping insertion in model container [2021-12-17 03:33:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:33:39" (2/3) ... [2021-12-17 03:33:41,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbafff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:33:41, skipping insertion in model container [2021-12-17 03:33:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:33:41" (3/3) ... [2021-12-17 03:33:41,028 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label49.c [2021-12-17 03:33:41,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:33:41,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:33:41,075 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:33:41,081 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:33:41,081 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:33:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 03:33:41,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:41,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:41,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash -781815326, now seen corresponding path program 1 times [2021-12-17 03:33:41,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:41,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829864208] [2021-12-17 03:33:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:41,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:33:41,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:41,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829864208] [2021-12-17 03:33:41,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829864208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:41,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:41,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:41,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743824818] [2021-12-17 03:33:41,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:41,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:41,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:41,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:41,501 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:42,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:42,281 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2021-12-17 03:33:42,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:42,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2021-12-17 03:33:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:42,293 INFO L225 Difference]: With dead ends: 857 [2021-12-17 03:33:42,294 INFO L226 Difference]: Without dead ends: 462 [2021-12-17 03:33:42,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:42,299 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 120 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:42,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:33:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-17 03:33:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-12-17 03:33:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2021-12-17 03:33:42,339 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 168 [2021-12-17 03:33:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:42,340 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2021-12-17 03:33:42,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2021-12-17 03:33:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-17 03:33:42,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:42,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:42,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:33:42,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 854785153, now seen corresponding path program 1 times [2021-12-17 03:33:42,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:42,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930972132] [2021-12-17 03:33:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:42,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:33:42,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:42,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930972132] [2021-12-17 03:33:42,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930972132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:42,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:42,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:42,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121774140] [2021-12-17 03:33:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:42,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:42,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:42,431 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:43,014 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2021-12-17 03:33:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:43,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 176 [2021-12-17 03:33:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:43,035 INFO L225 Difference]: With dead ends: 1344 [2021-12-17 03:33:43,035 INFO L226 Difference]: Without dead ends: 886 [2021-12-17 03:33:43,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:43,037 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:43,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:33:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-17 03:33:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2021-12-17 03:33:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2021-12-17 03:33:43,071 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 176 [2021-12-17 03:33:43,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:43,072 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2021-12-17 03:33:43,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2021-12-17 03:33:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-17 03:33:43,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:43,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:43,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:33:43,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:43,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:43,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1893411240, now seen corresponding path program 1 times [2021-12-17 03:33:43,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:43,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3138808] [2021-12-17 03:33:43,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:43,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 03:33:43,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:43,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3138808] [2021-12-17 03:33:43,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3138808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:43,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:43,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:33:43,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663289818] [2021-12-17 03:33:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:43,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:43,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:43,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:43,189 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:43,409 INFO L93 Difference]: Finished difference Result 2583 states and 3908 transitions. [2021-12-17 03:33:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 188 [2021-12-17 03:33:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:43,415 INFO L225 Difference]: With dead ends: 2583 [2021-12-17 03:33:43,415 INFO L226 Difference]: Without dead ends: 1715 [2021-12-17 03:33:43,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:43,418 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 361 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:43,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 585 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:33:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-12-17 03:33:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1711. [2021-12-17 03:33:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 1.5140350877192983) internal successors, (2589), 1710 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2589 transitions. [2021-12-17 03:33:43,472 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2589 transitions. Word has length 188 [2021-12-17 03:33:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:43,472 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2589 transitions. [2021-12-17 03:33:43,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2589 transitions. [2021-12-17 03:33:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 03:33:43,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:43,477 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:43,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:33:43,477 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash 651483907, now seen corresponding path program 1 times [2021-12-17 03:33:43,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:43,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019776149] [2021-12-17 03:33:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:43,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:33:43,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:43,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019776149] [2021-12-17 03:33:43,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019776149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:43,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663969864] [2021-12-17 03:33:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:43,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:43,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:43,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:33:43,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:33:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:43,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:33:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:33:43,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:33:43,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663969864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:43,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:33:43,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-17 03:33:43,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879529792] [2021-12-17 03:33:43,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:43,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:43,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:43,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:43,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:43,963 INFO L87 Difference]: Start difference. First operand 1711 states and 2589 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:44,577 INFO L93 Difference]: Finished difference Result 5050 states and 7657 transitions. [2021-12-17 03:33:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 190 [2021-12-17 03:33:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:44,588 INFO L225 Difference]: With dead ends: 5050 [2021-12-17 03:33:44,589 INFO L226 Difference]: Without dead ends: 3341 [2021-12-17 03:33:44,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:44,596 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 230 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:44,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:33:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-12-17 03:33:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 3338. [2021-12-17 03:33:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.3359304764758766) internal successors, (4458), 3337 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4458 transitions. [2021-12-17 03:33:44,661 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4458 transitions. Word has length 190 [2021-12-17 03:33:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:44,661 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 4458 transitions. [2021-12-17 03:33:44,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4458 transitions. [2021-12-17 03:33:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 03:33:44,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:44,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:44,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:33:44,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:44,885 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1330338245, now seen corresponding path program 1 times [2021-12-17 03:33:44,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:44,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047303149] [2021-12-17 03:33:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:44,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:33:44,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047303149] [2021-12-17 03:33:44,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047303149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:44,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:44,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:44,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128105488] [2021-12-17 03:33:44,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:44,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:44,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:44,935 INFO L87 Difference]: Start difference. First operand 3338 states and 4458 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:45,511 INFO L93 Difference]: Finished difference Result 9969 states and 13324 transitions. [2021-12-17 03:33:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 191 [2021-12-17 03:33:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:45,534 INFO L225 Difference]: With dead ends: 9969 [2021-12-17 03:33:45,534 INFO L226 Difference]: Without dead ends: 6633 [2021-12-17 03:33:45,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:45,542 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:45,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-12-17 03:33:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 6621. [2021-12-17 03:33:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6621 states, 6620 states have (on average 1.322809667673716) internal successors, (8757), 6620 states have internal predecessors, (8757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 8757 transitions. [2021-12-17 03:33:45,693 INFO L78 Accepts]: Start accepts. Automaton has 6621 states and 8757 transitions. Word has length 191 [2021-12-17 03:33:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:45,693 INFO L470 AbstractCegarLoop]: Abstraction has 6621 states and 8757 transitions. [2021-12-17 03:33:45,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 6621 states and 8757 transitions. [2021-12-17 03:33:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 03:33:45,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:45,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:45,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:33:45,701 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:45,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1613786835, now seen corresponding path program 1 times [2021-12-17 03:33:45,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:45,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041988594] [2021-12-17 03:33:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:45,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:33:45,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:45,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041988594] [2021-12-17 03:33:45,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041988594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:45,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:45,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:45,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576180657] [2021-12-17 03:33:45,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:45,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:45,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:45,763 INFO L87 Difference]: Start difference. First operand 6621 states and 8757 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:46,333 INFO L93 Difference]: Finished difference Result 17349 states and 23252 transitions. [2021-12-17 03:33:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2021-12-17 03:33:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:46,362 INFO L225 Difference]: With dead ends: 17349 [2021-12-17 03:33:46,362 INFO L226 Difference]: Without dead ends: 10730 [2021-12-17 03:33:46,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:46,372 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 217 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:46,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 153 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2021-12-17 03:33:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 9264. [2021-12-17 03:33:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9264 states, 9263 states have (on average 1.379466695455036) internal successors, (12778), 9263 states have internal predecessors, (12778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9264 states to 9264 states and 12778 transitions. [2021-12-17 03:33:46,554 INFO L78 Accepts]: Start accepts. Automaton has 9264 states and 12778 transitions. Word has length 194 [2021-12-17 03:33:46,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:46,554 INFO L470 AbstractCegarLoop]: Abstraction has 9264 states and 12778 transitions. [2021-12-17 03:33:46,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 9264 states and 12778 transitions. [2021-12-17 03:33:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-17 03:33:46,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:46,564 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:46,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:33:46,565 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:46,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1523843920, now seen corresponding path program 1 times [2021-12-17 03:33:46,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:46,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904528660] [2021-12-17 03:33:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:46,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 03:33:46,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:46,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904528660] [2021-12-17 03:33:46,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904528660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:46,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:46,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:46,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567783612] [2021-12-17 03:33:46,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:46,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:46,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:46,613 INFO L87 Difference]: Start difference. First operand 9264 states and 12778 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:46,984 INFO L93 Difference]: Finished difference Result 16827 states and 23048 transitions. [2021-12-17 03:33:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 203 [2021-12-17 03:33:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:47,006 INFO L225 Difference]: With dead ends: 16827 [2021-12-17 03:33:47,019 INFO L226 Difference]: Without dead ends: 7971 [2021-12-17 03:33:47,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:47,043 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:47,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 03:33:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7971 states. [2021-12-17 03:33:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7971 to 7971. [2021-12-17 03:33:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7971 states, 7970 states have (on average 1.3189460476787955) internal successors, (10512), 7970 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7971 states to 7971 states and 10512 transitions. [2021-12-17 03:33:47,213 INFO L78 Accepts]: Start accepts. Automaton has 7971 states and 10512 transitions. Word has length 203 [2021-12-17 03:33:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:47,213 INFO L470 AbstractCegarLoop]: Abstraction has 7971 states and 10512 transitions. [2021-12-17 03:33:47,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 7971 states and 10512 transitions. [2021-12-17 03:33:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-17 03:33:47,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:47,224 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:47,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:33:47,224 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 441011150, now seen corresponding path program 1 times [2021-12-17 03:33:47,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399963895] [2021-12-17 03:33:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:47,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:33:47,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:47,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399963895] [2021-12-17 03:33:47,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399963895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:47,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506913414] [2021-12-17 03:33:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:47,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:47,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:47,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:33:47,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:33:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:33:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 03:33:47,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:33:47,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506913414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:47,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:33:47,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:33:47,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886692064] [2021-12-17 03:33:47,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:47,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:47,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:47,759 INFO L87 Difference]: Start difference. First operand 7971 states and 10512 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:48,291 INFO L93 Difference]: Finished difference Result 22861 states and 30269 transitions. [2021-12-17 03:33:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:48,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 205 [2021-12-17 03:33:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:48,333 INFO L225 Difference]: With dead ends: 22861 [2021-12-17 03:33:48,333 INFO L226 Difference]: Without dead ends: 14892 [2021-12-17 03:33:48,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:48,342 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:48,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 102 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-12-17 03:33:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 11228. [2021-12-17 03:33:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11228 states, 11227 states have (on average 1.317805290816781) internal successors, (14795), 11227 states have internal predecessors, (14795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11228 states to 11228 states and 14795 transitions. [2021-12-17 03:33:48,503 INFO L78 Accepts]: Start accepts. Automaton has 11228 states and 14795 transitions. Word has length 205 [2021-12-17 03:33:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:48,503 INFO L470 AbstractCegarLoop]: Abstraction has 11228 states and 14795 transitions. [2021-12-17 03:33:48,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 11228 states and 14795 transitions. [2021-12-17 03:33:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-17 03:33:48,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:48,516 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:48,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:33:48,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 03:33:48,734 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash -236027744, now seen corresponding path program 1 times [2021-12-17 03:33:48,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:48,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447111128] [2021-12-17 03:33:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:48,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 03:33:48,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:48,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447111128] [2021-12-17 03:33:48,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447111128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:48,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:48,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:48,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705317019] [2021-12-17 03:33:48,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:48,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:48,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:48,814 INFO L87 Difference]: Start difference. First operand 11228 states and 14795 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:49,468 INFO L93 Difference]: Finished difference Result 27557 states and 36521 transitions. [2021-12-17 03:33:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:49,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 211 [2021-12-17 03:33:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:49,494 INFO L225 Difference]: With dead ends: 27557 [2021-12-17 03:33:49,494 INFO L226 Difference]: Without dead ends: 16331 [2021-12-17 03:33:49,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:49,508 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 201 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:49,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 131 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:33:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-12-17 03:33:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 15916. [2021-12-17 03:33:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15916 states, 15915 states have (on average 1.3334590009425071) internal successors, (21222), 15915 states have internal predecessors, (21222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15916 states to 15916 states and 21222 transitions. [2021-12-17 03:33:49,725 INFO L78 Accepts]: Start accepts. Automaton has 15916 states and 21222 transitions. Word has length 211 [2021-12-17 03:33:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:49,726 INFO L470 AbstractCegarLoop]: Abstraction has 15916 states and 21222 transitions. [2021-12-17 03:33:49,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 15916 states and 21222 transitions. [2021-12-17 03:33:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-17 03:33:49,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:49,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:49,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:33:49,740 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:49,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2021485274, now seen corresponding path program 1 times [2021-12-17 03:33:49,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:49,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415726295] [2021-12-17 03:33:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:49,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 03:33:49,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415726295] [2021-12-17 03:33:49,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415726295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:49,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:49,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:49,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856979157] [2021-12-17 03:33:49,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:49,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:49,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:49,830 INFO L87 Difference]: Start difference. First operand 15916 states and 21222 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:50,445 INFO L93 Difference]: Finished difference Result 37532 states and 49750 transitions. [2021-12-17 03:33:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:50,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-12-17 03:33:50,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:50,484 INFO L225 Difference]: With dead ends: 37532 [2021-12-17 03:33:50,485 INFO L226 Difference]: Without dead ends: 22025 [2021-12-17 03:33:50,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:50,501 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 202 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:50,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 118 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22025 states. [2021-12-17 03:33:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22025 to 20800. [2021-12-17 03:33:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20800 states, 20799 states have (on average 1.307851339006683) internal successors, (27202), 20799 states have internal predecessors, (27202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20800 states to 20800 states and 27202 transitions. [2021-12-17 03:33:50,803 INFO L78 Accepts]: Start accepts. Automaton has 20800 states and 27202 transitions. Word has length 213 [2021-12-17 03:33:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:50,803 INFO L470 AbstractCegarLoop]: Abstraction has 20800 states and 27202 transitions. [2021-12-17 03:33:50,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 20800 states and 27202 transitions. [2021-12-17 03:33:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-17 03:33:50,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:50,821 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:50,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:33:50,822 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1629645138, now seen corresponding path program 1 times [2021-12-17 03:33:50,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:50,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516835189] [2021-12-17 03:33:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:50,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 03:33:50,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:50,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516835189] [2021-12-17 03:33:50,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516835189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:50,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:50,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:50,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893971873] [2021-12-17 03:33:50,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:50,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:50,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:50,899 INFO L87 Difference]: Start difference. First operand 20800 states and 27202 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:51,525 INFO L93 Difference]: Finished difference Result 39351 states and 50855 transitions. [2021-12-17 03:33:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 222 [2021-12-17 03:33:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:51,570 INFO L225 Difference]: With dead ends: 39351 [2021-12-17 03:33:51,570 INFO L226 Difference]: Without dead ends: 25486 [2021-12-17 03:33:51,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:51,590 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 186 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:51,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 128 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25486 states. [2021-12-17 03:33:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25486 to 25481. [2021-12-17 03:33:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25481 states, 25480 states have (on average 1.2957613814756672) internal successors, (33016), 25480 states have internal predecessors, (33016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25481 states to 25481 states and 33016 transitions. [2021-12-17 03:33:51,981 INFO L78 Accepts]: Start accepts. Automaton has 25481 states and 33016 transitions. Word has length 222 [2021-12-17 03:33:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:51,981 INFO L470 AbstractCegarLoop]: Abstraction has 25481 states and 33016 transitions. [2021-12-17 03:33:51,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 25481 states and 33016 transitions. [2021-12-17 03:33:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-17 03:33:52,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:52,003 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:52,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:33:52,003 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1064424771, now seen corresponding path program 2 times [2021-12-17 03:33:52,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:52,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035559715] [2021-12-17 03:33:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:52,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 03:33:52,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:52,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035559715] [2021-12-17 03:33:52,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035559715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:52,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:52,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:33:52,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903551145] [2021-12-17 03:33:52,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:52,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:52,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:52,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:52,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:52,124 INFO L87 Difference]: Start difference. First operand 25481 states and 33016 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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) [2021-12-17 03:33:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:52,839 INFO L93 Difference]: Finished difference Result 59483 states and 78631 transitions. [2021-12-17 03:33:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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) Word has length 229 [2021-12-17 03:33:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:52,885 INFO L225 Difference]: With dead ends: 59483 [2021-12-17 03:33:52,885 INFO L226 Difference]: Without dead ends: 34004 [2021-12-17 03:33:52,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:52,907 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 214 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:52,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 149 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34004 states. [2021-12-17 03:33:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34004 to 34004. [2021-12-17 03:33:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34004 states, 34003 states have (on average 1.2248919213010616) internal successors, (41650), 34003 states have internal predecessors, (41650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34004 states to 34004 states and 41650 transitions. [2021-12-17 03:33:53,478 INFO L78 Accepts]: Start accepts. Automaton has 34004 states and 41650 transitions. Word has length 229 [2021-12-17 03:33:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:53,478 INFO L470 AbstractCegarLoop]: Abstraction has 34004 states and 41650 transitions. [2021-12-17 03:33:53,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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) [2021-12-17 03:33:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 34004 states and 41650 transitions. [2021-12-17 03:33:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-17 03:33:53,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:53,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:53,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:33:53,513 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash -480187620, now seen corresponding path program 1 times [2021-12-17 03:33:53,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:53,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304230971] [2021-12-17 03:33:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:53,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 03:33:53,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:53,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304230971] [2021-12-17 03:33:53,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304230971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:53,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:53,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:53,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559769841] [2021-12-17 03:33:53,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:53,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:53,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:53,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:53,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:53,658 INFO L87 Difference]: Start difference. First operand 34004 states and 41650 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:54,407 INFO L93 Difference]: Finished difference Result 62301 states and 75904 transitions. [2021-12-17 03:33:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:54,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 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 238 [2021-12-17 03:33:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:54,460 INFO L225 Difference]: With dead ends: 62301 [2021-12-17 03:33:54,460 INFO L226 Difference]: Without dead ends: 39289 [2021-12-17 03:33:54,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:54,485 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 154 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:54,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 165 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39289 states. [2021-12-17 03:33:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39289 to 39282. [2021-12-17 03:33:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39282 states, 39281 states have (on average 1.215600417504646) internal successors, (47750), 39281 states have internal predecessors, (47750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39282 states to 39282 states and 47750 transitions. [2021-12-17 03:33:55,218 INFO L78 Accepts]: Start accepts. Automaton has 39282 states and 47750 transitions. Word has length 238 [2021-12-17 03:33:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 39282 states and 47750 transitions. [2021-12-17 03:33:55,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 39282 states and 47750 transitions. [2021-12-17 03:33:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-17 03:33:55,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:55,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:55,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:33:55,254 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash 342018478, now seen corresponding path program 1 times [2021-12-17 03:33:55,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:55,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813816368] [2021-12-17 03:33:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:55,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:33:55,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:55,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813816368] [2021-12-17 03:33:55,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813816368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:55,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:55,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:33:55,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923609803] [2021-12-17 03:33:55,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:55,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:55,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:55,350 INFO L87 Difference]: Start difference. First operand 39282 states and 47750 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:55,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:55,971 INFO L93 Difference]: Finished difference Result 67371 states and 81595 transitions. [2021-12-17 03:33:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:55,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2021-12-17 03:33:55,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:56,019 INFO L225 Difference]: With dead ends: 67371 [2021-12-17 03:33:56,019 INFO L226 Difference]: Without dead ends: 39690 [2021-12-17 03:33:56,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:56,042 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:56,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 152 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:33:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39690 states. [2021-12-17 03:33:56,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39690 to 39688. [2021-12-17 03:33:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39688 states, 39687 states have (on average 1.214604278479099) internal successors, (48204), 39687 states have internal predecessors, (48204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39688 states to 39688 states and 48204 transitions. [2021-12-17 03:33:56,658 INFO L78 Accepts]: Start accepts. Automaton has 39688 states and 48204 transitions. Word has length 242 [2021-12-17 03:33:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:56,658 INFO L470 AbstractCegarLoop]: Abstraction has 39688 states and 48204 transitions. [2021-12-17 03:33:56,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 39688 states and 48204 transitions. [2021-12-17 03:33:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-17 03:33:56,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:56,678 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:56,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:33:56,678 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash -735414649, now seen corresponding path program 2 times [2021-12-17 03:33:56,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:56,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982533942] [2021-12-17 03:33:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:56,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 82 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 03:33:56,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:56,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982533942] [2021-12-17 03:33:56,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982533942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:56,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602315527] [2021-12-17 03:33:56,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 03:33:56,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:56,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:33:56,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:33:56,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 03:33:56,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 03:33:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:33:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 03:33:57,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:33:57,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602315527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:57,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:33:57,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-12-17 03:33:57,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801144725] [2021-12-17 03:33:57,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:57,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:57,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:33:57,376 INFO L87 Difference]: Start difference. First operand 39688 states and 48204 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:58,227 INFO L93 Difference]: Finished difference Result 84859 states and 103561 transitions. [2021-12-17 03:33:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 245 [2021-12-17 03:33:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:58,279 INFO L225 Difference]: With dead ends: 84859 [2021-12-17 03:33:58,280 INFO L226 Difference]: Without dead ends: 46798 [2021-12-17 03:33:58,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:33:58,297 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 155 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:58,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 159 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:33:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46798 states. [2021-12-17 03:33:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46798 to 45781. [2021-12-17 03:33:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45781 states, 45780 states have (on average 1.2005242463958061) internal successors, (54960), 45780 states have internal predecessors, (54960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45781 states to 45781 states and 54960 transitions. [2021-12-17 03:33:58,890 INFO L78 Accepts]: Start accepts. Automaton has 45781 states and 54960 transitions. Word has length 245 [2021-12-17 03:33:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:58,891 INFO L470 AbstractCegarLoop]: Abstraction has 45781 states and 54960 transitions. [2021-12-17 03:33:58,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 45781 states and 54960 transitions. [2021-12-17 03:33:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-17 03:33:58,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:58,922 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:58,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 03:33:59,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:59,136 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1915945221, now seen corresponding path program 1 times [2021-12-17 03:33:59,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:59,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489352552] [2021-12-17 03:33:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:59,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 03:33:59,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:59,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489352552] [2021-12-17 03:33:59,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489352552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:59,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:59,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:33:59,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149617992] [2021-12-17 03:33:59,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:59,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:33:59,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:33:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:33:59,221 INFO L87 Difference]: Start difference. First operand 45781 states and 54960 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:00,197 INFO L93 Difference]: Finished difference Result 98449 states and 119091 transitions. [2021-12-17 03:34:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:34:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 275 [2021-12-17 03:34:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:00,258 INFO L225 Difference]: With dead ends: 98449 [2021-12-17 03:34:00,258 INFO L226 Difference]: Without dead ends: 55109 [2021-12-17 03:34:00,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:34:00,278 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 434 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:00,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 56 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:34:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55109 states. [2021-12-17 03:34:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55109 to 55109. [2021-12-17 03:34:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55109 states, 55108 states have (on average 1.1655476518835741) internal successors, (64231), 55108 states have internal predecessors, (64231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55109 states to 55109 states and 64231 transitions. [2021-12-17 03:34:01,043 INFO L78 Accepts]: Start accepts. Automaton has 55109 states and 64231 transitions. Word has length 275 [2021-12-17 03:34:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:01,043 INFO L470 AbstractCegarLoop]: Abstraction has 55109 states and 64231 transitions. [2021-12-17 03:34:01,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 55109 states and 64231 transitions. [2021-12-17 03:34:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-12-17 03:34:01,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:01,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:01,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:34:01,082 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1978795867, now seen corresponding path program 1 times [2021-12-17 03:34:01,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:01,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089781147] [2021-12-17 03:34:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:01,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-17 03:34:01,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089781147] [2021-12-17 03:34:01,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089781147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:01,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:34:01,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:34:01,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410720361] [2021-12-17 03:34:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:01,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:34:01,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:01,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:34:01,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:34:01,164 INFO L87 Difference]: Start difference. First operand 55109 states and 64231 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:01,978 INFO L93 Difference]: Finished difference Result 102286 states and 119159 transitions. [2021-12-17 03:34:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:34:01,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 276 [2021-12-17 03:34:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:02,038 INFO L225 Difference]: With dead ends: 102286 [2021-12-17 03:34:02,038 INFO L226 Difference]: Without dead ends: 55515 [2021-12-17 03:34:02,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:34:02,070 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:02,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 159 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:34:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55515 states. [2021-12-17 03:34:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55515 to 55515. [2021-12-17 03:34:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55515 states, 55514 states have (on average 1.1645891126562669) internal successors, (64651), 55514 states have internal predecessors, (64651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55515 states to 55515 states and 64651 transitions. [2021-12-17 03:34:02,907 INFO L78 Accepts]: Start accepts. Automaton has 55515 states and 64651 transitions. Word has length 276 [2021-12-17 03:34:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:02,907 INFO L470 AbstractCegarLoop]: Abstraction has 55515 states and 64651 transitions. [2021-12-17 03:34:02,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 55515 states and 64651 transitions. [2021-12-17 03:34:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-17 03:34:02,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:02,939 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:02,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:34:02,940 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash 633248720, now seen corresponding path program 1 times [2021-12-17 03:34:02,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:02,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136027413] [2021-12-17 03:34:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:02,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-17 03:34:03,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136027413] [2021-12-17 03:34:03,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136027413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:34:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910931899] [2021-12-17 03:34:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:03,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:03,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:34:03,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:34:03,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:34:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:34:03,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:34:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-17 03:34:03,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:34:03,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910931899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:03,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:34:03,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:34:03,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969618194] [2021-12-17 03:34:03,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:03,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:34:03,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:34:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:03,540 INFO L87 Difference]: Start difference. First operand 55515 states and 64651 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:04,482 INFO L93 Difference]: Finished difference Result 131575 states and 153855 transitions. [2021-12-17 03:34:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:34:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 283 [2021-12-17 03:34:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:04,585 INFO L225 Difference]: With dead ends: 131575 [2021-12-17 03:34:04,585 INFO L226 Difference]: Without dead ends: 78704 [2021-12-17 03:34:04,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:04,624 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 86 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:04,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 127 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:34:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78704 states. [2021-12-17 03:34:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78704 to 78697. [2021-12-17 03:34:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78697 states, 78696 states have (on average 1.1500965741587883) internal successors, (90508), 78696 states have internal predecessors, (90508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78697 states to 78697 states and 90508 transitions. [2021-12-17 03:34:05,755 INFO L78 Accepts]: Start accepts. Automaton has 78697 states and 90508 transitions. Word has length 283 [2021-12-17 03:34:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:05,755 INFO L470 AbstractCegarLoop]: Abstraction has 78697 states and 90508 transitions. [2021-12-17 03:34:05,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 78697 states and 90508 transitions. [2021-12-17 03:34:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-17 03:34:05,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:05,800 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:05,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 03:34:06,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 03:34:06,001 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash 104456279, now seen corresponding path program 1 times [2021-12-17 03:34:06,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076098764] [2021-12-17 03:34:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:06,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-17 03:34:06,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:06,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076098764] [2021-12-17 03:34:06,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076098764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:34:06,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212867577] [2021-12-17 03:34:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:06,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:06,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:34:06,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:34:06,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 03:34:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:06,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:34:06,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:34:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 03:34:06,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:34:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212867577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:06,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:34:06,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:34:06,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413801511] [2021-12-17 03:34:06,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:06,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:34:06,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:34:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:06,609 INFO L87 Difference]: Start difference. First operand 78697 states and 90508 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:07,483 INFO L93 Difference]: Finished difference Result 204356 states and 235648 transitions. [2021-12-17 03:34:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:34:07,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2021-12-17 03:34:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:07,650 INFO L225 Difference]: With dead ends: 204356 [2021-12-17 03:34:07,650 INFO L226 Difference]: Without dead ends: 128506 [2021-12-17 03:34:07,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:07,707 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 224 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:07,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 804 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:34:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128506 states. [2021-12-17 03:34:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128506 to 128500. [2021-12-17 03:34:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128500 states, 128499 states have (on average 1.1403979797508152) internal successors, (146540), 128499 states have internal predecessors, (146540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128500 states to 128500 states and 146540 transitions. [2021-12-17 03:34:09,628 INFO L78 Accepts]: Start accepts. Automaton has 128500 states and 146540 transitions. Word has length 306 [2021-12-17 03:34:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:09,628 INFO L470 AbstractCegarLoop]: Abstraction has 128500 states and 146540 transitions. [2021-12-17 03:34:09,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 128500 states and 146540 transitions. [2021-12-17 03:34:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-17 03:34:09,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:09,699 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:09,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 03:34:09,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:09,907 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1911611869, now seen corresponding path program 1 times [2021-12-17 03:34:09,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:09,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606654493] [2021-12-17 03:34:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:09,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 143 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-17 03:34:09,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606654493] [2021-12-17 03:34:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606654493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:34:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513479473] [2021-12-17 03:34:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:09,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:34:09,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:34:09,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 03:34:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:10,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:34:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:34:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-17 03:34:10,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:34:10,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513479473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:10,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:34:10,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:34:10,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984027628] [2021-12-17 03:34:10,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:10,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:34:10,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:10,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:34:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:10,484 INFO L87 Difference]: Start difference. First operand 128500 states and 146540 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:11,773 INFO L93 Difference]: Finished difference Result 253748 states and 289415 transitions. [2021-12-17 03:34:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:34:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 308 [2021-12-17 03:34:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:12,197 INFO L225 Difference]: With dead ends: 253748 [2021-12-17 03:34:12,197 INFO L226 Difference]: Without dead ends: 127078 [2021-12-17 03:34:12,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:12,265 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 92 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:12,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:34:12,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127078 states. [2021-12-17 03:34:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127078 to 122600. [2021-12-17 03:34:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122600 states, 122599 states have (on average 1.12856548585225) internal successors, (138361), 122599 states have internal predecessors, (138361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122600 states to 122600 states and 138361 transitions. [2021-12-17 03:34:13,995 INFO L78 Accepts]: Start accepts. Automaton has 122600 states and 138361 transitions. Word has length 308 [2021-12-17 03:34:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:14,002 INFO L470 AbstractCegarLoop]: Abstraction has 122600 states and 138361 transitions. [2021-12-17 03:34:14,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 122600 states and 138361 transitions. [2021-12-17 03:34:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-17 03:34:14,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:14,082 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:14,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 03:34:14,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:14,283 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1411476975, now seen corresponding path program 1 times [2021-12-17 03:34:14,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:14,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699432687] [2021-12-17 03:34:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:14,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 03:34:14,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:14,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699432687] [2021-12-17 03:34:14,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699432687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:14,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:34:14,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:34:14,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438154953] [2021-12-17 03:34:14,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:14,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:34:14,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:14,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:34:14,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:34:14,370 INFO L87 Difference]: Start difference. First operand 122600 states and 138361 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:15,318 INFO L93 Difference]: Finished difference Result 216523 states and 243704 transitions. [2021-12-17 03:34:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:34:15,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 317 [2021-12-17 03:34:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:15,661 INFO L225 Difference]: With dead ends: 216523 [2021-12-17 03:34:15,661 INFO L226 Difference]: Without dead ends: 95551 [2021-12-17 03:34:15,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:34:15,704 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 229 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:15,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 327 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:34:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95551 states. [2021-12-17 03:34:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95551 to 91073. [2021-12-17 03:34:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91073 states, 91072 states have (on average 1.104719342937456) internal successors, (100609), 91072 states have internal predecessors, (100609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91073 states to 91073 states and 100609 transitions. [2021-12-17 03:34:16,820 INFO L78 Accepts]: Start accepts. Automaton has 91073 states and 100609 transitions. Word has length 317 [2021-12-17 03:34:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:16,820 INFO L470 AbstractCegarLoop]: Abstraction has 91073 states and 100609 transitions. [2021-12-17 03:34:16,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 91073 states and 100609 transitions. [2021-12-17 03:34:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-17 03:34:16,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:16,887 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:16,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:34:16,887 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:16,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2067797645, now seen corresponding path program 1 times [2021-12-17 03:34:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:16,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160233122] [2021-12-17 03:34:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:16,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:34:17,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:17,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160233122] [2021-12-17 03:34:17,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160233122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:17,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:34:17,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:34:17,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405521188] [2021-12-17 03:34:17,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:17,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:34:17,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:17,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:34:17,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:34:17,019 INFO L87 Difference]: Start difference. First operand 91073 states and 100609 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:18,317 INFO L93 Difference]: Finished difference Result 230325 states and 254560 transitions. [2021-12-17 03:34:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:34:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 349 [2021-12-17 03:34:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:18,493 INFO L225 Difference]: With dead ends: 230325 [2021-12-17 03:34:18,494 INFO L226 Difference]: Without dead ends: 141286 [2021-12-17 03:34:18,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:34:18,556 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 796 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:18,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 49 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:34:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141286 states. [2021-12-17 03:34:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141286 to 138444. [2021-12-17 03:34:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138444 states, 138443 states have (on average 1.106570935330786) internal successors, (153197), 138443 states have internal predecessors, (153197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138444 states to 138444 states and 153197 transitions. [2021-12-17 03:34:20,472 INFO L78 Accepts]: Start accepts. Automaton has 138444 states and 153197 transitions. Word has length 349 [2021-12-17 03:34:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:20,473 INFO L470 AbstractCegarLoop]: Abstraction has 138444 states and 153197 transitions. [2021-12-17 03:34:20,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 138444 states and 153197 transitions. [2021-12-17 03:34:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-17 03:34:20,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:20,581 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:20,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:34:20,582 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash -805353426, now seen corresponding path program 1 times [2021-12-17 03:34:20,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:20,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265810025] [2021-12-17 03:34:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:20,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-12-17 03:34:20,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265810025] [2021-12-17 03:34:20,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265810025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:34:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136591785] [2021-12-17 03:34:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:20,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:20,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:34:21,019 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:34:21,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 03:34:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:34:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:34:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 03:34:21,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:34:21,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136591785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:21,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:34:21,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:34:21,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489950194] [2021-12-17 03:34:21,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:21,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:34:21,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:21,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:34:21,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:21,658 INFO L87 Difference]: Start difference. First operand 138444 states and 153197 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:22,771 INFO L93 Difference]: Finished difference Result 269567 states and 298351 transitions. [2021-12-17 03:34:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:34:22,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 389 [2021-12-17 03:34:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:22,938 INFO L225 Difference]: With dead ends: 269567 [2021-12-17 03:34:22,938 INFO L226 Difference]: Without dead ends: 133157 [2021-12-17 03:34:23,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:23,361 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 117 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:23,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 94 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:34:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133157 states. [2021-12-17 03:34:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133157 to 107362. [2021-12-17 03:34:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107362 states, 107361 states have (on average 1.0865677480649398) internal successors, (116655), 107361 states have internal predecessors, (116655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107362 states to 107362 states and 116655 transitions. [2021-12-17 03:34:24,805 INFO L78 Accepts]: Start accepts. Automaton has 107362 states and 116655 transitions. Word has length 389 [2021-12-17 03:34:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:24,806 INFO L470 AbstractCegarLoop]: Abstraction has 107362 states and 116655 transitions. [2021-12-17 03:34:24,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 107362 states and 116655 transitions. [2021-12-17 03:34:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-12-17 03:34:24,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:24,887 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:24,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 03:34:25,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:25,095 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash 402375071, now seen corresponding path program 1 times [2021-12-17 03:34:25,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:25,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430416347] [2021-12-17 03:34:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:25,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-12-17 03:34:25,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:25,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430416347] [2021-12-17 03:34:25,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430416347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:34:25,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732765992] [2021-12-17 03:34:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:25,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:25,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:34:25,194 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:34:25,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 03:34:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:25,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:34:25,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:34:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-17 03:34:26,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:34:26,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732765992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:26,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:34:26,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:34:26,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598028488] [2021-12-17 03:34:26,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:26,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:34:26,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:34:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:26,042 INFO L87 Difference]: Start difference. First operand 107362 states and 116655 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:26,829 INFO L93 Difference]: Finished difference Result 278752 states and 303416 transitions. [2021-12-17 03:34:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:34:26,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 430 [2021-12-17 03:34:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:27,066 INFO L225 Difference]: With dead ends: 278752 [2021-12-17 03:34:27,066 INFO L226 Difference]: Without dead ends: 173424 [2021-12-17 03:34:27,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:27,143 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 274 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:27,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 868 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:34:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173424 states. [2021-12-17 03:34:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173424 to 172201. [2021-12-17 03:34:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172201 states, 172200 states have (on average 1.0828745644599302) internal successors, (186471), 172200 states have internal predecessors, (186471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172201 states to 172201 states and 186471 transitions. [2021-12-17 03:34:30,030 INFO L78 Accepts]: Start accepts. Automaton has 172201 states and 186471 transitions. Word has length 430 [2021-12-17 03:34:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:34:30,031 INFO L470 AbstractCegarLoop]: Abstraction has 172201 states and 186471 transitions. [2021-12-17 03:34:30,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 172201 states and 186471 transitions. [2021-12-17 03:34:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-12-17 03:34:30,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:34:30,169 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:34:30,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 03:34:30,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-17 03:34:30,376 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:34:30,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:34:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash 984119373, now seen corresponding path program 1 times [2021-12-17 03:34:30,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:34:30,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154100233] [2021-12-17 03:34:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:30,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:34:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2021-12-17 03:34:30,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:34:30,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154100233] [2021-12-17 03:34:30,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154100233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:34:30,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129385884] [2021-12-17 03:34:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:34:30,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:34:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:34:30,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:34:30,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 03:34:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:34:30,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:34:30,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:34:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-17 03:34:31,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:34:31,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129385884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:34:31,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:34:31,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:34:31,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72373244] [2021-12-17 03:34:31,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:34:31,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:34:31,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:34:31,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:34:31,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:31,141 INFO L87 Difference]: Start difference. First operand 172201 states and 186471 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:34:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:34:32,652 INFO L93 Difference]: Finished difference Result 408194 states and 442016 transitions. [2021-12-17 03:34:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:34:32,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 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 441 [2021-12-17 03:34:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:34:32,983 INFO L225 Difference]: With dead ends: 408194 [2021-12-17 03:34:32,983 INFO L226 Difference]: Without dead ends: 238027 [2021-12-17 03:34:33,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:34:33,100 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 186 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:34:33,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 438 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:34:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238027 states.