./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label39.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/Problem18_label39.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 f0612bb91079a4342bce93cd5005e7b82df3fd34455b6d64ae48c6a29323af8c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:06:16,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:06:16,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:06:16,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:06:16,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:06:16,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:06:16,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:06:16,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:06:16,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:06:16,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:06:16,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:06:16,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:06:16,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:06:16,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:06:16,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:06:16,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:06:16,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:06:16,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:06:16,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:06:16,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:06:16,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:06:16,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:06:16,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:06:16,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:06:16,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:06:16,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:06:16,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:06:16,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:06:16,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:06:16,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:06:16,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:06:16,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:06:16,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:06:16,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:06:16,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:06:16,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:06:16,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:06:16,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:06:16,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:06:16,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:06:16,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:06:16,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:06:16,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:06:16,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:06:16,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:06:16,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:06:16,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:06:16,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:06:16,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:06:16,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:06:16,211 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:06:16,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:06:16,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:06:16,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:06:16,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:06:16,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:06:16,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:06:16,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:06:16,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:06:16,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:06:16,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:06:16,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:06:16,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:06:16,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:06:16,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:06:16,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:06:16,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:06:16,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:06:16,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:06:16,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:06:16,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:06:16,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:06:16,215 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:06:16,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:06:16,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:06:16,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:06:16,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0612bb91079a4342bce93cd5005e7b82df3fd34455b6d64ae48c6a29323af8c [2021-12-15 23:06:16,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:06:16,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:06:16,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:06:16,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:06:16,382 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:06:16,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label39.c [2021-12-15 23:06:16,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b84967fbc/42ed8691dd99445bb391bba9da4a98cd/FLAG46874968d [2021-12-15 23:06:16,901 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:06:16,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label39.c [2021-12-15 23:06:16,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b84967fbc/42ed8691dd99445bb391bba9da4a98cd/FLAG46874968d [2021-12-15 23:06:17,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b84967fbc/42ed8691dd99445bb391bba9da4a98cd [2021-12-15 23:06:17,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:06:17,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:06:17,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:06:17,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:06:17,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:06:17,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:06:17" (1/1) ... [2021-12-15 23:06:17,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a0a445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:17, skipping insertion in model container [2021-12-15 23:06:17,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:06:17" (1/1) ... [2021-12-15 23:06:17,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:06:17,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:06:17,440 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/Problem18_label39.c[1705,1718] [2021-12-15 23:06:17,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:06:17,914 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:06:17,931 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/Problem18_label39.c[1705,1718] [2021-12-15 23:06:18,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:06:18,152 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:06:18,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18 WrapperNode [2021-12-15 23:06:18,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:06:18,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:06:18,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:06:18,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:06:18,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,303 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-12-15 23:06:18,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:06:18,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:06:18,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:06:18,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:06:18,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:06:18,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:06:18,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:06:18,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:06:18,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (1/1) ... [2021-12-15 23:06:18,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:06:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:06:18,593 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 23:06:18,595 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 23:06:18,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:06:18,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:06:18,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:06:18,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:06:18,682 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:06:18,684 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:06:20,609 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:06:20,620 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:06:20,620 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:06:20,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:06:20 BoogieIcfgContainer [2021-12-15 23:06:20,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:06:20,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:06:20,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:06:20,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:06:20,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:06:17" (1/3) ... [2021-12-15 23:06:20,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44664e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:06:20, skipping insertion in model container [2021-12-15 23:06:20,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:06:18" (2/3) ... [2021-12-15 23:06:20,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44664e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:06:20, skipping insertion in model container [2021-12-15 23:06:20,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:06:20" (3/3) ... [2021-12-15 23:06:20,629 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label39.c [2021-12-15 23:06:20,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:06:20,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:06:20,667 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:06:20,671 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 23:06:20,672 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:06:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 23:06:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 23:06:20,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:20,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:06:20,702 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-12-15 23:06:20,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:20,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157257934] [2021-12-15 23:06:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:20,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:20,816 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 23:06:20,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:20,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157257934] [2021-12-15 23:06:20,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157257934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:20,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:20,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:06:20,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454201960] [2021-12-15 23:06:20,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:20,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:20,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:20,841 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states 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 23:06:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:23,200 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2021-12-15 23:06:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-15 23:06:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:23,216 INFO L225 Difference]: With dead ends: 2205 [2021-12-15 23:06:23,216 INFO L226 Difference]: Without dead ends: 1384 [2021-12-15 23:06:23,221 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 23:06:23,223 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 703 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:23,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 532 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 23:06:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-12-15 23:06:23,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-12-15 23:06:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.5777295733911787) internal successors, (2182), 1383 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 23:06:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2182 transitions. [2021-12-15 23:06:23,315 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2182 transitions. Word has length 13 [2021-12-15 23:06:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:23,316 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2182 transitions. [2021-12-15 23:06:23,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states 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 23:06:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2182 transitions. [2021-12-15 23:06:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 23:06:23,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:23,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:06:23,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:06:23,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1241996447, now seen corresponding path program 1 times [2021-12-15 23:06:23,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:23,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65387033] [2021-12-15 23:06:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:23,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:06:23,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65387033] [2021-12-15 23:06:23,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65387033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:23,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:23,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:06:23,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973593995] [2021-12-15 23:06:23,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:23,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:23,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:23,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:23,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:23,470 INFO L87 Difference]: Start difference. First operand 1384 states and 2182 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:06:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:25,727 INFO L93 Difference]: Finished difference Result 4146 states and 6541 transitions. [2021-12-15 23:06:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:25,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-15 23:06:25,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:25,736 INFO L225 Difference]: With dead ends: 4146 [2021-12-15 23:06:25,736 INFO L226 Difference]: Without dead ends: 2764 [2021-12-15 23:06:25,738 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 23:06:25,738 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 713 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:25,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 529 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 23:06:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-12-15 23:06:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-12-15 23:06:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.3481722765110387) internal successors, (3725), 2763 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states 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 23:06:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3725 transitions. [2021-12-15 23:06:25,779 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3725 transitions. Word has length 79 [2021-12-15 23:06:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:25,779 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3725 transitions. [2021-12-15 23:06:25,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:06:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3725 transitions. [2021-12-15 23:06:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 23:06:25,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:25,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:06:25,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:06:25,782 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:25,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:25,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1704420817, now seen corresponding path program 1 times [2021-12-15 23:06:25,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:25,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549937109] [2021-12-15 23:06:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:25,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:06:25,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:25,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549937109] [2021-12-15 23:06:25,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549937109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:25,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:25,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:06:25,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599205103] [2021-12-15 23:06:25,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:25,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:25,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:25,882 INFO L87 Difference]: Start difference. First operand 2764 states and 3725 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 23:06:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:28,198 INFO L93 Difference]: Finished difference Result 8288 states and 11171 transitions. [2021-12-15 23:06:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-12-15 23:06:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:28,215 INFO L225 Difference]: With dead ends: 8288 [2021-12-15 23:06:28,216 INFO L226 Difference]: Without dead ends: 5526 [2021-12-15 23:06:28,219 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 23:06:28,225 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 690 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:28,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 434 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 23:06:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-12-15 23:06:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 5524. [2021-12-15 23:06:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.2299474923049067) internal successors, (6793), 5523 states have internal predecessors, (6793), 0 states have call successors, (0), 0 states 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 23:06:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 6793 transitions. [2021-12-15 23:06:28,312 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 6793 transitions. Word has length 99 [2021-12-15 23:06:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:28,313 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 6793 transitions. [2021-12-15 23:06:28,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 23:06:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 6793 transitions. [2021-12-15 23:06:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 23:06:28,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:28,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:06:28,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:06:28,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash -750359424, now seen corresponding path program 1 times [2021-12-15 23:06:28,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:28,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395175196] [2021-12-15 23:06:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:28,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:06:28,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:28,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395175196] [2021-12-15 23:06:28,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395175196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:28,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:28,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:06:28,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860707941] [2021-12-15 23:06:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:28,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:28,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:28,391 INFO L87 Difference]: Start difference. First operand 5524 states and 6793 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 23:06:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:30,424 INFO L93 Difference]: Finished difference Result 13806 states and 17314 transitions. [2021-12-15 23:06:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:30,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-15 23:06:30,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:30,442 INFO L225 Difference]: With dead ends: 13806 [2021-12-15 23:06:30,442 INFO L226 Difference]: Without dead ends: 6904 [2021-12-15 23:06:30,449 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 23:06:30,450 INFO L933 BasicCegarLoop]: 1195 mSDtfsCounter, 742 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:30,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1202 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 23:06:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2021-12-15 23:06:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6904. [2021-12-15 23:06:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.0921338548457193) internal successors, (7539), 6903 states have internal predecessors, (7539), 0 states have call successors, (0), 0 states 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 23:06:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 7539 transitions. [2021-12-15 23:06:30,531 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 7539 transitions. Word has length 106 [2021-12-15 23:06:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:30,532 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 7539 transitions. [2021-12-15 23:06:30,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 23:06:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 7539 transitions. [2021-12-15 23:06:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-15 23:06:30,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:30,535 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2021-12-15 23:06:30,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:06:30,536 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:30,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1064927, now seen corresponding path program 1 times [2021-12-15 23:06:30,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:30,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506724107] [2021-12-15 23:06:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:30,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 23:06:30,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:30,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506724107] [2021-12-15 23:06:30,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506724107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:30,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:30,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:06:30,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593960270] [2021-12-15 23:06:30,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:30,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:06:30,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:30,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:06:30,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:06:30,699 INFO L87 Difference]: Start difference. First operand 6904 states and 7539 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 23:06:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:33,178 INFO L93 Difference]: Finished difference Result 15186 states and 16476 transitions. [2021-12-15 23:06:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:06:33,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 316 [2021-12-15 23:06:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:33,199 INFO L225 Difference]: With dead ends: 15186 [2021-12-15 23:06:33,199 INFO L226 Difference]: Without dead ends: 8284 [2021-12-15 23:06:33,203 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 23:06:33,205 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 1873 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 3368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:33,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1873 Valid, 318 Invalid, 3368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3353 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 23:06:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2021-12-15 23:06:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2021-12-15 23:06:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 1.078715441265242) internal successors, (8935), 8283 states have internal predecessors, (8935), 0 states have call successors, (0), 0 states 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 23:06:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 8935 transitions. [2021-12-15 23:06:33,352 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 8935 transitions. Word has length 316 [2021-12-15 23:06:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:33,352 INFO L470 AbstractCegarLoop]: Abstraction has 8284 states and 8935 transitions. [2021-12-15 23:06:33,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 23:06:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 8935 transitions. [2021-12-15 23:06:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-15 23:06:33,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:33,360 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:33,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:06:33,361 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:33,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:33,362 INFO L85 PathProgramCache]: Analyzing trace with hash -763628788, now seen corresponding path program 1 times [2021-12-15 23:06:33,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:33,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625052278] [2021-12-15 23:06:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:33,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 23:06:33,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:33,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625052278] [2021-12-15 23:06:33,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625052278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:33,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:33,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:06:33,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094628866] [2021-12-15 23:06:33,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:33,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:33,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:33,497 INFO L87 Difference]: Start difference. First operand 8284 states and 8935 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 23:06:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:35,166 INFO L93 Difference]: Finished difference Result 19326 states and 21066 transitions. [2021-12-15 23:06:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 398 [2021-12-15 23:06:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:35,198 INFO L225 Difference]: With dead ends: 19326 [2021-12-15 23:06:35,198 INFO L226 Difference]: Without dead ends: 11044 [2021-12-15 23:06:35,204 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 23:06:35,207 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 680 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:35,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 979 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 23:06:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11044 states. [2021-12-15 23:06:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11044 to 11044. [2021-12-15 23:06:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11044 states, 11043 states have (on average 1.0681879923933715) internal successors, (11796), 11043 states have internal predecessors, (11796), 0 states have call successors, (0), 0 states 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 23:06:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 11796 transitions. [2021-12-15 23:06:35,339 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 11796 transitions. Word has length 398 [2021-12-15 23:06:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:35,339 INFO L470 AbstractCegarLoop]: Abstraction has 11044 states and 11796 transitions. [2021-12-15 23:06:35,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 23:06:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 11796 transitions. [2021-12-15 23:06:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-12-15 23:06:35,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:35,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:35,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 23:06:35,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:35,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1368535940, now seen corresponding path program 1 times [2021-12-15 23:06:35,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:35,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000297488] [2021-12-15 23:06:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:35,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-15 23:06:35,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:35,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000297488] [2021-12-15 23:06:35,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000297488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:35,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:35,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:06:35,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790256646] [2021-12-15 23:06:35,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:35,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:35,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:35,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:35,469 INFO L87 Difference]: Start difference. First operand 11044 states and 11796 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 23:06:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:37,168 INFO L93 Difference]: Finished difference Result 24846 states and 26788 transitions. [2021-12-15 23:06:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:37,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 465 [2021-12-15 23:06:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:37,184 INFO L225 Difference]: With dead ends: 24846 [2021-12-15 23:06:37,185 INFO L226 Difference]: Without dead ends: 12424 [2021-12-15 23:06:37,192 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 23:06:37,194 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 697 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:37,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 939 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 23:06:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12424 states. [2021-12-15 23:06:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12424 to 12424. [2021-12-15 23:06:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 1.065523625533285) internal successors, (13237), 12423 states have internal predecessors, (13237), 0 states have call successors, (0), 0 states 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 23:06:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 13237 transitions. [2021-12-15 23:06:37,340 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 13237 transitions. Word has length 465 [2021-12-15 23:06:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:37,340 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 13237 transitions. [2021-12-15 23:06:37,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 23:06:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 13237 transitions. [2021-12-15 23:06:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2021-12-15 23:06:37,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:37,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:37,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:06:37,348 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:37,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2027633464, now seen corresponding path program 1 times [2021-12-15 23:06:37,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:37,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623787311] [2021-12-15 23:06:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:37,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 23:06:37,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:37,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623787311] [2021-12-15 23:06:37,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623787311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:37,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:37,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:06:37,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928329437] [2021-12-15 23:06:37,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:37,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:37,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:37,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:37,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:37,519 INFO L87 Difference]: Start difference. First operand 12424 states and 13237 transitions. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 23:06:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:39,051 INFO L93 Difference]: Finished difference Result 34506 states and 36870 transitions. [2021-12-15 23:06:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 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 553 [2021-12-15 23:06:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:39,081 INFO L225 Difference]: With dead ends: 34506 [2021-12-15 23:06:39,081 INFO L226 Difference]: Without dead ends: 22084 [2021-12-15 23:06:39,090 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 23:06:39,090 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 573 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:39,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 917 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:06:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2021-12-15 23:06:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 21394. [2021-12-15 23:06:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21394 states, 21393 states have (on average 1.052026363763848) internal successors, (22506), 21393 states have internal predecessors, (22506), 0 states have call successors, (0), 0 states 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 23:06:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21394 states to 21394 states and 22506 transitions. [2021-12-15 23:06:39,289 INFO L78 Accepts]: Start accepts. Automaton has 21394 states and 22506 transitions. Word has length 553 [2021-12-15 23:06:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:39,290 INFO L470 AbstractCegarLoop]: Abstraction has 21394 states and 22506 transitions. [2021-12-15 23:06:39,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 23:06:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 21394 states and 22506 transitions. [2021-12-15 23:06:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2021-12-15 23:06:39,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:39,301 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:06:39,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:06:39,302 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:39,302 INFO L85 PathProgramCache]: Analyzing trace with hash -916000471, now seen corresponding path program 1 times [2021-12-15 23:06:39,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:39,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905516988] [2021-12-15 23:06:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:39,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-12-15 23:06:39,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905516988] [2021-12-15 23:06:39,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905516988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:39,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:39,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:06:39,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068815829] [2021-12-15 23:06:39,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:39,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:39,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:39,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:39,491 INFO L87 Difference]: Start difference. First operand 21394 states and 22506 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 23:06:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:40,961 INFO L93 Difference]: Finished difference Result 42786 states and 45010 transitions. [2021-12-15 23:06:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 646 [2021-12-15 23:06:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:40,987 INFO L225 Difference]: With dead ends: 42786 [2021-12-15 23:06:40,988 INFO L226 Difference]: Without dead ends: 21394 [2021-12-15 23:06:40,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 23:06:40,999 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 784 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:41,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 746 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:06:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21394 states. [2021-12-15 23:06:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21394 to 21394. [2021-12-15 23:06:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21394 states, 21393 states have (on average 1.0452484457532838) internal successors, (22361), 21393 states have internal predecessors, (22361), 0 states have call successors, (0), 0 states 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 23:06:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21394 states to 21394 states and 22361 transitions. [2021-12-15 23:06:41,179 INFO L78 Accepts]: Start accepts. Automaton has 21394 states and 22361 transitions. Word has length 646 [2021-12-15 23:06:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:41,179 INFO L470 AbstractCegarLoop]: Abstraction has 21394 states and 22361 transitions. [2021-12-15 23:06:41,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 23:06:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 21394 states and 22361 transitions. [2021-12-15 23:06:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-12-15 23:06:41,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:41,192 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:41,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:06:41,192 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1060470219, now seen corresponding path program 1 times [2021-12-15 23:06:41,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:41,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284997646] [2021-12-15 23:06:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:41,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 662 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 23:06:41,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284997646] [2021-12-15 23:06:41,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284997646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:41,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:41,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:06:41,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437507937] [2021-12-15 23:06:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:41,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:41,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:41,348 INFO L87 Difference]: Start difference. First operand 21394 states and 22361 transitions. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 23:06:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:42,929 INFO L93 Difference]: Finished difference Result 49686 states and 52217 transitions. [2021-12-15 23:06:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:42,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 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 688 [2021-12-15 23:06:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:42,964 INFO L225 Difference]: With dead ends: 49686 [2021-12-15 23:06:42,964 INFO L226 Difference]: Without dead ends: 28294 [2021-12-15 23:06:42,977 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 23:06:42,978 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 603 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:42,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 263 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:06:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28294 states. [2021-12-15 23:06:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28294 to 28294. [2021-12-15 23:06:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28294 states, 28293 states have (on average 1.042696073233662) internal successors, (29501), 28293 states have internal predecessors, (29501), 0 states have call successors, (0), 0 states 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 23:06:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28294 states to 28294 states and 29501 transitions. [2021-12-15 23:06:43,224 INFO L78 Accepts]: Start accepts. Automaton has 28294 states and 29501 transitions. Word has length 688 [2021-12-15 23:06:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:43,224 INFO L470 AbstractCegarLoop]: Abstraction has 28294 states and 29501 transitions. [2021-12-15 23:06:43,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 23:06:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28294 states and 29501 transitions. [2021-12-15 23:06:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1205 [2021-12-15 23:06:43,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:43,240 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:43,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 23:06:43,241 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1153501923, now seen corresponding path program 1 times [2021-12-15 23:06:43,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:43,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975440150] [2021-12-15 23:06:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:43,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 1023 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2021-12-15 23:06:43,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975440150] [2021-12-15 23:06:43,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975440150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:43,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:06:43,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:06:43,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653575943] [2021-12-15 23:06:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:43,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:43,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:06:43,638 INFO L87 Difference]: Start difference. First operand 28294 states and 29501 transitions. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 23:06:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:45,302 INFO L93 Difference]: Finished difference Result 69006 states and 72324 transitions. [2021-12-15 23:06:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:45,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 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 1204 [2021-12-15 23:06:45,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:45,347 INFO L225 Difference]: With dead ends: 69006 [2021-12-15 23:06:45,347 INFO L226 Difference]: Without dead ends: 41404 [2021-12-15 23:06:45,368 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 23:06:45,369 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 624 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:45,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 207 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:06:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2021-12-15 23:06:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 41404. [2021-12-15 23:06:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.0411564379392797) internal successors, (43107), 41403 states have internal predecessors, (43107), 0 states have call successors, (0), 0 states 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 23:06:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 43107 transitions. [2021-12-15 23:06:45,800 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 43107 transitions. Word has length 1204 [2021-12-15 23:06:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:45,801 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 43107 transitions. [2021-12-15 23:06:45,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 23:06:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 43107 transitions. [2021-12-15 23:06:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1207 [2021-12-15 23:06:45,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:45,817 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:45,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 23:06:45,817 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 118236372, now seen corresponding path program 1 times [2021-12-15 23:06:45,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:45,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542404516] [2021-12-15 23:06:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:45,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1459 backedges. 984 proven. 330 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-15 23:06:46,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:46,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542404516] [2021-12-15 23:06:46,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542404516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:06:46,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202235294] [2021-12-15 23:06:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:46,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:06:46,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:06:46,284 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 23:06:46,285 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 23:06:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:46,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:06:46,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:06:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1459 backedges. 908 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-12-15 23:06:48,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:06:48,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202235294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:48,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:06:48,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 23:06:48,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30573987] [2021-12-15 23:06:48,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:48,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:48,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:48,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:48,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:06:48,281 INFO L87 Difference]: Start difference. First operand 41404 states and 43107 transitions. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 23:06:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:49,957 INFO L93 Difference]: Finished difference Result 96606 states and 101199 transitions. [2021-12-15 23:06:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:49,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 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 1206 [2021-12-15 23:06:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:50,022 INFO L225 Difference]: With dead ends: 96606 [2021-12-15 23:06:50,022 INFO L226 Difference]: Without dead ends: 55894 [2021-12-15 23:06:50,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1205 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:06:50,041 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 609 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:50,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 171 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:06:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55894 states. [2021-12-15 23:06:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55894 to 54514. [2021-12-15 23:06:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54514 states, 54513 states have (on average 1.0417698530625723) internal successors, (56790), 54513 states have internal predecessors, (56790), 0 states have call successors, (0), 0 states 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 23:06:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54514 states to 54514 states and 56790 transitions. [2021-12-15 23:06:50,649 INFO L78 Accepts]: Start accepts. Automaton has 54514 states and 56790 transitions. Word has length 1206 [2021-12-15 23:06:50,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:50,650 INFO L470 AbstractCegarLoop]: Abstraction has 54514 states and 56790 transitions. [2021-12-15 23:06:50,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 23:06:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand 54514 states and 56790 transitions. [2021-12-15 23:06:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1344 [2021-12-15 23:06:50,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:50,781 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:50,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:06:50,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 23:06:50,982 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash 989951523, now seen corresponding path program 1 times [2021-12-15 23:06:50,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:50,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475445685] [2021-12-15 23:06:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:50,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 1363 proven. 308 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-12-15 23:06:51,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475445685] [2021-12-15 23:06:51,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475445685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:06:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500456696] [2021-12-15 23:06:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:51,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:06:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:06:51,544 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) [2021-12-15 23:06:51,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:06:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:51,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:06:51,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:06:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 1300 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-12-15 23:06:53,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:06:53,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500456696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:53,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:06:53,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 23:06:53,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074832624] [2021-12-15 23:06:53,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:53,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:53,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:53,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:53,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:06:53,566 INFO L87 Difference]: Start difference. First operand 54514 states and 56790 transitions. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 23:06:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:06:55,401 INFO L93 Difference]: Finished difference Result 123516 states and 129070 transitions. [2021-12-15 23:06:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:06:55,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 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 1343 [2021-12-15 23:06:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:06:55,516 INFO L225 Difference]: With dead ends: 123516 [2021-12-15 23:06:55,516 INFO L226 Difference]: Without dead ends: 69694 [2021-12-15 23:06:55,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1348 GetRequests, 1343 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:06:55,558 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 623 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:06:55,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 975 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:06:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69694 states. [2021-12-15 23:06:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69694 to 69694. [2021-12-15 23:06:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69694 states, 69693 states have (on average 1.0373925645330233) internal successors, (72299), 69693 states have internal predecessors, (72299), 0 states have call successors, (0), 0 states 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 23:06:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69694 states to 69694 states and 72299 transitions. [2021-12-15 23:06:56,494 INFO L78 Accepts]: Start accepts. Automaton has 69694 states and 72299 transitions. Word has length 1343 [2021-12-15 23:06:56,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:06:56,494 INFO L470 AbstractCegarLoop]: Abstraction has 69694 states and 72299 transitions. [2021-12-15 23:06:56,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 23:06:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 69694 states and 72299 transitions. [2021-12-15 23:06:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1358 [2021-12-15 23:06:56,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:06:56,537 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:56,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:06:56,754 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,SelfDestructingSolverStorable12 [2021-12-15 23:06:56,755 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:06:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:06:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash 662234665, now seen corresponding path program 1 times [2021-12-15 23:06:56,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:06:56,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61907454] [2021-12-15 23:06:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:56,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:06:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 1369 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-15 23:06:57,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:06:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61907454] [2021-12-15 23:06:57,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61907454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:06:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122482227] [2021-12-15 23:06:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:06:57,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:06:57,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:06:57,645 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) [2021-12-15 23:06:57,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:06:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:06:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:06:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:06:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 1549 trivial. 0 not checked. [2021-12-15 23:06:58,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:06:58,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122482227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:06:58,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:06:58,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 23:06:58,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043082305] [2021-12-15 23:06:58,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:06:58,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:06:58,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:06:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:06:58,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:06:58,943 INFO L87 Difference]: Start difference. First operand 69694 states and 72299 transitions. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states 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 23:07:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:07:00,219 INFO L93 Difference]: Finished difference Result 138696 states and 143905 transitions. [2021-12-15 23:07:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:07:00,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 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 1357 [2021-12-15 23:07:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:07:00,290 INFO L225 Difference]: With dead ends: 138696 [2021-12-15 23:07:00,290 INFO L226 Difference]: Without dead ends: 68314 [2021-12-15 23:07:00,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1363 GetRequests, 1356 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:07:00,322 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 642 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:07:00,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 807 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 23:07:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68314 states. [2021-12-15 23:07:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68314 to 66934. [2021-12-15 23:07:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66934 states, 66933 states have (on average 1.0319423901513454) internal successors, (69071), 66933 states have internal predecessors, (69071), 0 states have call successors, (0), 0 states 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 23:07:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66934 states to 66934 states and 69071 transitions. [2021-12-15 23:07:01,128 INFO L78 Accepts]: Start accepts. Automaton has 66934 states and 69071 transitions. Word has length 1357 [2021-12-15 23:07:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:07:01,128 INFO L470 AbstractCegarLoop]: Abstraction has 66934 states and 69071 transitions. [2021-12-15 23:07:01,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states 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 23:07:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 66934 states and 69071 transitions. [2021-12-15 23:07:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1365 [2021-12-15 23:07:01,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:07:01,149 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:01,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 23:07:01,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:07:01,363 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:07:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:07:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2070731189, now seen corresponding path program 1 times [2021-12-15 23:07:01,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:07:01,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102484469] [2021-12-15 23:07:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:07:01,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:07:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:07:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 1647 proven. 0 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-12-15 23:07:02,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:07:02,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102484469] [2021-12-15 23:07:02,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102484469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:07:02,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:07:02,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:07:02,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700064868] [2021-12-15 23:07:02,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:07:02,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:07:02,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:07:02,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:07:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:07:02,213 INFO L87 Difference]: Start difference. First operand 66934 states and 69071 transitions. Second operand has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 23:07:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:07:04,996 INFO L93 Difference]: Finished difference Result 166986 states and 172981 transitions. [2021-12-15 23:07:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:07:04,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 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 1364 [2021-12-15 23:07:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:07:05,116 INFO L225 Difference]: With dead ends: 166986 [2021-12-15 23:07:05,117 INFO L226 Difference]: Without dead ends: 99364 [2021-12-15 23:07:05,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 23:07:05,386 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 1241 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 3690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:07:05,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 966 Invalid, 3690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:07:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99364 states. [2021-12-15 23:07:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99364 to 99364. [2021-12-15 23:07:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99364 states, 99363 states have (on average 1.0285820677717057) internal successors, (102203), 99363 states have internal predecessors, (102203), 0 states have call successors, (0), 0 states 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 23:07:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99364 states to 99364 states and 102203 transitions. [2021-12-15 23:07:06,879 INFO L78 Accepts]: Start accepts. Automaton has 99364 states and 102203 transitions. Word has length 1364 [2021-12-15 23:07:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:07:06,880 INFO L470 AbstractCegarLoop]: Abstraction has 99364 states and 102203 transitions. [2021-12-15 23:07:06,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 23:07:06,881 INFO L276 IsEmpty]: Start isEmpty. Operand 99364 states and 102203 transitions. [2021-12-15 23:07:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1450 [2021-12-15 23:07:06,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:07:06,910 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:06,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 23:07:06,911 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:07:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:07:06,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1301725950, now seen corresponding path program 1 times [2021-12-15 23:07:06,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:07:06,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826842371] [2021-12-15 23:07:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:07:06,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:07:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:07:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2577 backedges. 1646 proven. 330 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-12-15 23:07:07,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:07:07,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826842371] [2021-12-15 23:07:07,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826842371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:07:07,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758070718] [2021-12-15 23:07:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:07:07,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:07:07,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:07:07,862 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) [2021-12-15 23:07:07,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 23:07:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:07:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:07:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:07:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2577 backedges. 1414 proven. 0 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-12-15 23:07:09,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:07:09,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758070718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:07:09,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:07:09,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 23:07:09,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966673475] [2021-12-15 23:07:09,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:07:09,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:07:09,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:07:09,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:07:09,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:07:09,913 INFO L87 Difference]: Start difference. First operand 99364 states and 102203 transitions. Second operand has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 23:07:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:07:11,982 INFO L93 Difference]: Finished difference Result 214596 states and 221159 transitions. [2021-12-15 23:07:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:07:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 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 1449 [2021-12-15 23:07:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:07:12,287 INFO L225 Difference]: With dead ends: 214596 [2021-12-15 23:07:12,287 INFO L226 Difference]: Without dead ends: 115924 [2021-12-15 23:07:12,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1455 GetRequests, 1448 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:07:12,303 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 624 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:07:12,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 945 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:07:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115924 states. [2021-12-15 23:07:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115924 to 111094. [2021-12-15 23:07:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111094 states, 111093 states have (on average 1.0298038580288587) internal successors, (114404), 111093 states have internal predecessors, (114404), 0 states have call successors, (0), 0 states 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 23:07:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111094 states to 111094 states and 114404 transitions. [2021-12-15 23:07:13,435 INFO L78 Accepts]: Start accepts. Automaton has 111094 states and 114404 transitions. Word has length 1449 [2021-12-15 23:07:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:07:13,436 INFO L470 AbstractCegarLoop]: Abstraction has 111094 states and 114404 transitions. [2021-12-15 23:07:13,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 23:07:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 111094 states and 114404 transitions. [2021-12-15 23:07:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1497 [2021-12-15 23:07:13,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:07:13,462 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:13,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 23:07:13,679 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,SelfDestructingSolverStorable15 [2021-12-15 23:07:13,679 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:07:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:07:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 510857035, now seen corresponding path program 1 times [2021-12-15 23:07:13,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:07:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183038171] [2021-12-15 23:07:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:07:13,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:07:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:07:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2817 backedges. 1772 proven. 330 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-15 23:07:14,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:07:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183038171] [2021-12-15 23:07:14,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183038171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:07:14,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662776153] [2021-12-15 23:07:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:07:14,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:07:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:07:14,376 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) [2021-12-15 23:07:14,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 23:07:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:07:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:07:14,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:07:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2817 backedges. 1257 proven. 0 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2021-12-15 23:07:16,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:07:16,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662776153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:07:16,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:07:16,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 23:07:16,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294555001] [2021-12-15 23:07:16,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:07:16,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:07:16,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:07:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:07:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:07:16,313 INFO L87 Difference]: Start difference. First operand 111094 states and 114404 transitions. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 23:07:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:07:17,899 INFO L93 Difference]: Finished difference Result 221496 states and 228115 transitions. [2021-12-15 23:07:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:07:17,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 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 1496 [2021-12-15 23:07:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:07:18,059 INFO L225 Difference]: With dead ends: 221496 [2021-12-15 23:07:18,059 INFO L226 Difference]: Without dead ends: 111094 [2021-12-15 23:07:18,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1502 GetRequests, 1495 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:07:18,112 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 630 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:07:18,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 128 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 23:07:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111094 states. [2021-12-15 23:07:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111094 to 111094. [2021-12-15 23:07:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111094 states, 111093 states have (on average 1.021603521373984) internal successors, (113493), 111093 states have internal predecessors, (113493), 0 states have call successors, (0), 0 states 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 23:07:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111094 states to 111094 states and 113493 transitions. [2021-12-15 23:07:19,441 INFO L78 Accepts]: Start accepts. Automaton has 111094 states and 113493 transitions. Word has length 1496 [2021-12-15 23:07:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:07:19,441 INFO L470 AbstractCegarLoop]: Abstraction has 111094 states and 113493 transitions. [2021-12-15 23:07:19,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 23:07:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 111094 states and 113493 transitions. [2021-12-15 23:07:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1523 [2021-12-15 23:07:19,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:07:19,466 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:19,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 23:07:19,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 23:07:19,684 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:07:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:07:19,685 INFO L85 PathProgramCache]: Analyzing trace with hash 477774154, now seen corresponding path program 1 times [2021-12-15 23:07:19,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:07:19,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165920778] [2021-12-15 23:07:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:07:19,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:07:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat