./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label12.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/Problem13_label12.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 2216b6fe23bc362f77d3473af93ca10876808f5c3f0da946e2005e7d4e8e688a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:44:45,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:44:45,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:44:45,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:44:45,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:44:45,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:44:45,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:44:45,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:44:45,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:44:45,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:44:45,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:44:45,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:44:45,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:44:45,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:44:45,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:44:45,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:44:45,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:44:45,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:44:45,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:44:45,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:44:45,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:44:45,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:44:45,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:44:45,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:44:45,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:44:45,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:44:45,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:44:45,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:44:45,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:44:45,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:44:45,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:44:45,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:44:45,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:44:45,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:44:45,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:44:45,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:44:45,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:44:45,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:44:45,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:44:45,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:44:45,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:44:45,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:44:45,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:44:45,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:44:45,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:44:45,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:44:45,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:44:45,190 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:44:45,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:44:45,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:44:45,191 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:44:45,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:44:45,192 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:44:45,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:44:45,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:44:45,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:44:45,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:44:45,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:44:45,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:44:45,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:44:45,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:44:45,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:44:45,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:44:45,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:44:45,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:44:45,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:44:45,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:44:45,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:44:45,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:44:45,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:44:45,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:44:45,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:44:45,197 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:44:45,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:44:45,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:44:45,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:44:45,198 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2216b6fe23bc362f77d3473af93ca10876808f5c3f0da946e2005e7d4e8e688a [2021-12-15 22:44:45,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:44:45,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:44:45,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:44:45,430 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:44:45,430 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:44:45,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label12.c [2021-12-15 22:44:45,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d661b1e7/902b07a5380f46f89b7738958332a51e/FLAG3299b8094 [2021-12-15 22:44:46,193 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:44:46,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label12.c [2021-12-15 22:44:46,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d661b1e7/902b07a5380f46f89b7738958332a51e/FLAG3299b8094 [2021-12-15 22:44:46,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d661b1e7/902b07a5380f46f89b7738958332a51e [2021-12-15 22:44:46,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:44:46,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:44:46,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:44:46,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:44:46,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:44:46,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:44:46" (1/1) ... [2021-12-15 22:44:46,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1759cbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:46, skipping insertion in model container [2021-12-15 22:44:46,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:44:46" (1/1) ... [2021-12-15 22:44:46,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:44:46,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:44:46,878 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/Problem13_label12.c[1672,1685] [2021-12-15 22:44:47,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:44:47,691 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:44:47,714 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/Problem13_label12.c[1672,1685] [2021-12-15 22:44:48,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:44:48,285 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:44:48,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48 WrapperNode [2021-12-15 22:44:48,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:44:48,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:44:48,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:44:48,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:44:48,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:48,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:48,898 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:44:48,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:44:48,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:44:48,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:44:48,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:44:48,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:48,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:49,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:49,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:49,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:49,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:49,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:49,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:44:49,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:44:49,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:44:49,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:44:49,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (1/1) ... [2021-12-15 22:44:49,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:44:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:44:49,628 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) [2021-12-15 22:44:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:44:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:44:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:44:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:44:49,636 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 [2021-12-15 22:44:49,744 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:44:49,746 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:44:54,088 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:44:54,114 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:44:54,114 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:44:54,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:44:54 BoogieIcfgContainer [2021-12-15 22:44:54,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:44:54,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:44:54,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:44:54,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:44:54,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:44:46" (1/3) ... [2021-12-15 22:44:54,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b956ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:44:54, skipping insertion in model container [2021-12-15 22:44:54,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:48" (2/3) ... [2021-12-15 22:44:54,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b956ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:44:54, skipping insertion in model container [2021-12-15 22:44:54,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:44:54" (3/3) ... [2021-12-15 22:44:54,128 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label12.c [2021-12-15 22:44:54,133 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:44:54,133 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:44:54,195 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:44:54,204 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 [2021-12-15 22:44:54,205 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:44:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 22:44:54,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:54,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:54,258 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:54,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash 647015545, now seen corresponding path program 1 times [2021-12-15 22:44:54,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:54,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858337526] [2021-12-15 22:44:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:54,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:54,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858337526] [2021-12-15 22:44:54,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858337526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:54,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:54,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:44:54,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427811855] [2021-12-15 22:44:54,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:54,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:54,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:54,488 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:58,439 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2021-12-15 22:44:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:58,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-15 22:44:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:58,475 INFO L225 Difference]: With dead ends: 3082 [2021-12-15 22:44:58,476 INFO L226 Difference]: Without dead ends: 1899 [2021-12-15 22:44:58,485 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 [2021-12-15 22:44:58,489 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 1030 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:58,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1030 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-15 22:44:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-12-15 22:44:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2021-12-15 22:44:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2021-12-15 22:44:58,622 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 9 [2021-12-15 22:44:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:58,623 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2021-12-15 22:44:58,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2021-12-15 22:44:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 22:44:58,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:58,626 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:44:58,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:44:58,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash -398980046, now seen corresponding path program 1 times [2021-12-15 22:44:58,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:58,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694910801] [2021-12-15 22:44:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:58,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:58,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:58,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694910801] [2021-12-15 22:44:58,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694910801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:58,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:58,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:58,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617844891] [2021-12-15 22:44:58,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:58,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:58,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:58,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:58,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:58,852 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:04,530 INFO L93 Difference]: Finished difference Result 6175 states and 10777 transitions. [2021-12-15 22:45:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:45:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-15 22:45:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:04,547 INFO L225 Difference]: With dead ends: 6175 [2021-12-15 22:45:04,547 INFO L226 Difference]: Without dead ends: 4283 [2021-12-15 22:45:04,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:45:04,551 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 2571 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 1314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2571 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 5545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1314 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:04,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2571 Valid, 1099 Invalid, 5545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1314 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 22:45:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-12-15 22:45:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 4282. [2021-12-15 22:45:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 4281 states have (on average 1.4879701004438215) internal successors, (6370), 4281 states have internal predecessors, (6370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 6370 transitions. [2021-12-15 22:45:04,628 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 6370 transitions. Word has length 74 [2021-12-15 22:45:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:04,629 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 6370 transitions. [2021-12-15 22:45:04,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 6370 transitions. [2021-12-15 22:45:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-15 22:45:04,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:04,636 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:45:04,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:45:04,637 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1025374449, now seen corresponding path program 1 times [2021-12-15 22:45:04,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:04,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306802691] [2021-12-15 22:45:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:04,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:45:04,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:04,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306802691] [2021-12-15 22:45:04,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306802691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:04,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:04,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:04,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616192915] [2021-12-15 22:45:04,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:04,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:45:04,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:45:04,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:45:04,815 INFO L87 Difference]: Start difference. First operand 4282 states and 6370 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:10,148 INFO L93 Difference]: Finished difference Result 13467 states and 21400 transitions. [2021-12-15 22:45:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:45:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-12-15 22:45:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:10,190 INFO L225 Difference]: With dead ends: 13467 [2021-12-15 22:45:10,191 INFO L226 Difference]: Without dead ends: 9974 [2021-12-15 22:45:10,200 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 [2021-12-15 22:45:10,202 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 1672 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6244 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1672 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 7085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 6244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:10,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1672 Valid, 1124 Invalid, 7085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 6244 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 22:45:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9974 states. [2021-12-15 22:45:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9974 to 9836. [2021-12-15 22:45:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9836 states, 9835 states have (on average 1.4418912048805288) internal successors, (14181), 9835 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9836 states to 9836 states and 14181 transitions. [2021-12-15 22:45:10,402 INFO L78 Accepts]: Start accepts. Automaton has 9836 states and 14181 transitions. Word has length 134 [2021-12-15 22:45:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:10,403 INFO L470 AbstractCegarLoop]: Abstraction has 9836 states and 14181 transitions. [2021-12-15 22:45:10,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 9836 states and 14181 transitions. [2021-12-15 22:45:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 22:45:10,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:10,406 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, 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] [2021-12-15 22:45:10,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:45:10,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1109990301, now seen corresponding path program 1 times [2021-12-15 22:45:10,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728487565] [2021-12-15 22:45:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:10,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:45:10,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:10,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728487565] [2021-12-15 22:45:10,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728487565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:10,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:10,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:45:10,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457904177] [2021-12-15 22:45:10,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:10,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:10,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:10,563 INFO L87 Difference]: Start difference. First operand 9836 states and 14181 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:13,690 INFO L93 Difference]: Finished difference Result 27581 states and 40499 transitions. [2021-12-15 22:45:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2021-12-15 22:45:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:13,744 INFO L225 Difference]: With dead ends: 27581 [2021-12-15 22:45:13,744 INFO L226 Difference]: Without dead ends: 18534 [2021-12-15 22:45:13,759 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 [2021-12-15 22:45:13,761 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 946 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:13,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 865 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:45:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18534 states. [2021-12-15 22:45:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18534 to 18523. [2021-12-15 22:45:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18523 states, 18522 states have (on average 1.3251268761472843) internal successors, (24544), 18522 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 24544 transitions. [2021-12-15 22:45:14,067 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 24544 transitions. Word has length 176 [2021-12-15 22:45:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:14,068 INFO L470 AbstractCegarLoop]: Abstraction has 18523 states and 24544 transitions. [2021-12-15 22:45:14,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 24544 transitions. [2021-12-15 22:45:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-15 22:45:14,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:14,071 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:45:14,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:45:14,072 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1732076473, now seen corresponding path program 1 times [2021-12-15 22:45:14,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436543665] [2021-12-15 22:45:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:14,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:45:14,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:14,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436543665] [2021-12-15 22:45:14,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436543665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:14,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:14,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:14,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719588217] [2021-12-15 22:45:14,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:14,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:14,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:14,224 INFO L87 Difference]: Start difference. First operand 18523 states and 24544 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:17,413 INFO L93 Difference]: Finished difference Result 52015 states and 69799 transitions. [2021-12-15 22:45:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:17,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-12-15 22:45:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:17,484 INFO L225 Difference]: With dead ends: 52015 [2021-12-15 22:45:17,485 INFO L226 Difference]: Without dead ends: 34281 [2021-12-15 22:45:17,503 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 [2021-12-15 22:45:17,508 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 843 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:17,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 952 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 22:45:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34281 states. [2021-12-15 22:45:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34281 to 34271. [2021-12-15 22:45:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34271 states, 34270 states have (on average 1.2549168368835717) internal successors, (43006), 34270 states have internal predecessors, (43006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34271 states to 34271 states and 43006 transitions. [2021-12-15 22:45:17,982 INFO L78 Accepts]: Start accepts. Automaton has 34271 states and 43006 transitions. Word has length 216 [2021-12-15 22:45:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:17,983 INFO L470 AbstractCegarLoop]: Abstraction has 34271 states and 43006 transitions. [2021-12-15 22:45:17,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 34271 states and 43006 transitions. [2021-12-15 22:45:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-15 22:45:17,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:17,990 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:45:17,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:45:17,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash 860615328, now seen corresponding path program 1 times [2021-12-15 22:45:17,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:17,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037942771] [2021-12-15 22:45:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:17,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 22:45:18,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:18,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037942771] [2021-12-15 22:45:18,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037942771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:18,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:18,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:45:18,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510853061] [2021-12-15 22:45:18,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:18,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:18,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:18,139 INFO L87 Difference]: Start difference. First operand 34271 states and 43006 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:21,412 INFO L93 Difference]: Finished difference Result 92929 states and 117609 transitions. [2021-12-15 22:45:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-12-15 22:45:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:21,520 INFO L225 Difference]: With dead ends: 92929 [2021-12-15 22:45:21,520 INFO L226 Difference]: Without dead ends: 59447 [2021-12-15 22:45:21,567 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 [2021-12-15 22:45:21,569 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 856 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:21,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 987 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 22:45:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59447 states. [2021-12-15 22:45:22,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59447 to 57081. [2021-12-15 22:45:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57081 states, 57080 states have (on average 1.1983707077785564) internal successors, (68403), 57080 states have internal predecessors, (68403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57081 states to 57081 states and 68403 transitions. [2021-12-15 22:45:22,787 INFO L78 Accepts]: Start accepts. Automaton has 57081 states and 68403 transitions. Word has length 239 [2021-12-15 22:45:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:22,787 INFO L470 AbstractCegarLoop]: Abstraction has 57081 states and 68403 transitions. [2021-12-15 22:45:22,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 57081 states and 68403 transitions. [2021-12-15 22:45:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-15 22:45:22,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:22,792 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:22,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:45:22,793 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1317486818, now seen corresponding path program 1 times [2021-12-15 22:45:22,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:22,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717782982] [2021-12-15 22:45:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:22,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:45:22,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:22,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717782982] [2021-12-15 22:45:22,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717782982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:22,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:22,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:22,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990564928] [2021-12-15 22:45:22,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:22,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:45:22,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:22,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:45:22,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:45:22,917 INFO L87 Difference]: Start difference. First operand 57081 states and 68403 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:29,668 INFO L93 Difference]: Finished difference Result 152948 states and 185497 transitions. [2021-12-15 22:45:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:45:29,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 297 [2021-12-15 22:45:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:29,837 INFO L225 Difference]: With dead ends: 152948 [2021-12-15 22:45:29,837 INFO L226 Difference]: Without dead ends: 96656 [2021-12-15 22:45:29,881 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 [2021-12-15 22:45:29,882 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 1734 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 6695 mSolverCounterSat, 1118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1734 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 7813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1118 IncrementalHoareTripleChecker+Valid, 6695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:29,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1734 Valid, 742 Invalid, 7813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1118 Valid, 6695 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-15 22:45:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96656 states. [2021-12-15 22:45:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96656 to 95739. [2021-12-15 22:45:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95739 states, 95738 states have (on average 1.1950218304121665) internal successors, (114409), 95738 states have internal predecessors, (114409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95739 states to 95739 states and 114409 transitions. [2021-12-15 22:45:31,142 INFO L78 Accepts]: Start accepts. Automaton has 95739 states and 114409 transitions. Word has length 297 [2021-12-15 22:45:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:31,143 INFO L470 AbstractCegarLoop]: Abstraction has 95739 states and 114409 transitions. [2021-12-15 22:45:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 95739 states and 114409 transitions. [2021-12-15 22:45:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 22:45:31,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:31,149 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:31,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:45:31,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 31985099, now seen corresponding path program 1 times [2021-12-15 22:45:31,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:31,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881400711] [2021-12-15 22:45:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:31,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:45:31,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:31,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881400711] [2021-12-15 22:45:31,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881400711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:31,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:31,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:31,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335847343] [2021-12-15 22:45:31,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:31,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:31,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:31,279 INFO L87 Difference]: Start difference. First operand 95739 states and 114409 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:34,941 INFO L93 Difference]: Finished difference Result 221422 states and 263416 transitions. [2021-12-15 22:45:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 [2021-12-15 22:45:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:35,274 INFO L225 Difference]: With dead ends: 221422 [2021-12-15 22:45:35,275 INFO L226 Difference]: Without dead ends: 126472 [2021-12-15 22:45:35,326 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 [2021-12-15 22:45:35,328 INFO L933 BasicCegarLoop]: 1852 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:35,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1994 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:45:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126472 states. [2021-12-15 22:45:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126472 to 126434. [2021-12-15 22:45:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126434 states, 126433 states have (on average 1.168516131073375) internal successors, (147739), 126433 states have internal predecessors, (147739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126434 states to 126434 states and 147739 transitions. [2021-12-15 22:45:37,157 INFO L78 Accepts]: Start accepts. Automaton has 126434 states and 147739 transitions. Word has length 306 [2021-12-15 22:45:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:37,158 INFO L470 AbstractCegarLoop]: Abstraction has 126434 states and 147739 transitions. [2021-12-15 22:45:37,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 126434 states and 147739 transitions. [2021-12-15 22:45:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-15 22:45:37,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:37,161 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:37,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:45:37,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash 151828499, now seen corresponding path program 1 times [2021-12-15 22:45:37,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:37,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443553591] [2021-12-15 22:45:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:37,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 185 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:45:37,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:37,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443553591] [2021-12-15 22:45:37,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443553591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:45:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359648647] [2021-12-15 22:45:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:37,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:45:37,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:45:37,467 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) [2021-12-15 22:45:37,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:45:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:45:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:45:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-15 22:45:38,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:45:38,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359648647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:38,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:45:38,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:45:38,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059558610] [2021-12-15 22:45:38,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:38,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:38,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:45:38,367 INFO L87 Difference]: Start difference. First operand 126434 states and 147739 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)