./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 37e549e4fa4b7b530556a3e37b4e2d4806fbb92dab5da0115a6c327b48fa0370 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:40:28,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:40:28,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:40:28,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:40:28,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:40:28,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:40:28,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:40:28,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:40:28,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:40:28,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:40:28,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:40:28,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:40:28,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:40:28,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:40:28,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:40:28,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:40:28,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:40:28,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:40:28,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:40:28,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:40:28,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:40:28,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:40:28,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:40:28,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:40:28,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:40:28,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:40:28,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:40:28,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:40:28,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:40:28,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:40:28,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:40:28,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:40:28,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:40:28,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:40:28,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:40:28,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:40:28,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:40:28,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:40:28,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:40:28,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:40:28,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:40:28,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:40:28,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:40:28,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:40:28,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:40:28,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:40:28,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:40:28,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:40:28,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:40:28,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:40:28,224 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:40:28,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:40:28,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:40:28,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:40:28,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:40:28,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:40:28,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:40:28,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:40:28,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:40:28,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:40:28,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:40:28,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:40:28,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:40:28,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:40:28,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:40:28,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:40:28,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:40:28,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:40:28,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:40:28,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:40:28,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:40:28,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:40:28,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:40:28,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:40:28,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:40:28,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:40:28,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37e549e4fa4b7b530556a3e37b4e2d4806fbb92dab5da0115a6c327b48fa0370 [2021-12-15 11:40:28,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:40:28,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:40:28,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:40:28,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:40:28,444 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:40:28,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:40:28,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49e0fbedb/cc821ff044de4d189ed6ae40a1d2cf87/FLAG4d07c0368 [2021-12-15 11:40:28,914 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:40:28,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:40:28,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49e0fbedb/cc821ff044de4d189ed6ae40a1d2cf87/FLAG4d07c0368 [2021-12-15 11:40:29,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49e0fbedb/cc821ff044de4d189ed6ae40a1d2cf87 [2021-12-15 11:40:29,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:40:29,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:40:29,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:40:29,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:40:29,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:40:29,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e165e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29, skipping insertion in model container [2021-12-15 11:40:29,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:40:29,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:40:29,584 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13490,13503] [2021-12-15 11:40:29,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:40:29,653 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:40:29,747 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13490,13503] [2021-12-15 11:40:29,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:40:29,805 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:40:29,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29 WrapperNode [2021-12-15 11:40:29,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:40:29,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:40:29,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:40:29,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:40:29,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,897 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1333 [2021-12-15 11:40:29,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:40:29,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:40:29,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:40:29,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:40:29,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:40:29,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:40:29,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:40:29,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:40:29,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (1/1) ... [2021-12-15 11:40:29,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:40:29,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:40:30,005 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 11:40:30,025 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 11:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:40:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:40:30,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:40:30,219 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:40:30,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:40:30,967 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:40:30,981 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:40:30,981 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:40:30,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:40:30 BoogieIcfgContainer [2021-12-15 11:40:30,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:40:31,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:40:31,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:40:31,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:40:31,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:40:29" (1/3) ... [2021-12-15 11:40:31,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564942e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:40:31, skipping insertion in model container [2021-12-15 11:40:31,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:40:29" (2/3) ... [2021-12-15 11:40:31,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564942e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:40:31, skipping insertion in model container [2021-12-15 11:40:31,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:40:30" (3/3) ... [2021-12-15 11:40:31,007 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:40:31,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:40:31,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:40:31,053 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:40:31,060 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 11:40:31,061 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:40:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 338 states, 336 states have (on average 1.7797619047619047) internal successors, (598), 337 states have internal predecessors, (598), 0 states have call successors, (0), 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 11:40:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 11:40:31,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:31,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:31,110 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash -139604630, now seen corresponding path program 1 times [2021-12-15 11:40:31,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:31,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723197122] [2021-12-15 11:40:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:31,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:31,496 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 11:40:31,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:31,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723197122] [2021-12-15 11:40:31,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723197122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:31,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:31,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:40:31,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93222982] [2021-12-15 11:40:31,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:31,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:40:31,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:31,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:40:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:40:31,543 INFO L87 Difference]: Start difference. First operand has 338 states, 336 states have (on average 1.7797619047619047) internal successors, (598), 337 states have internal predecessors, (598), 0 states have call successors, (0), 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 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 11:40:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:31,686 INFO L93 Difference]: Finished difference Result 640 states and 1100 transitions. [2021-12-15 11:40:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:40:31,693 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 11:40:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:31,709 INFO L225 Difference]: With dead ends: 640 [2021-12-15 11:40:31,709 INFO L226 Difference]: Without dead ends: 477 [2021-12-15 11:40:31,713 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 11:40:31,722 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 254 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:31,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1122 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:40:31,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-12-15 11:40:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 474. [2021-12-15 11:40:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.668076109936575) internal successors, (789), 473 states have internal predecessors, (789), 0 states have call successors, (0), 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 11:40:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 789 transitions. [2021-12-15 11:40:31,799 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 789 transitions. Word has length 106 [2021-12-15 11:40:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:31,800 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 789 transitions. [2021-12-15 11:40:31,800 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 11:40:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 789 transitions. [2021-12-15 11:40:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 11:40:31,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:31,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:31,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:40:31,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:31,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1315500352, now seen corresponding path program 1 times [2021-12-15 11:40:31,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:31,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139660433] [2021-12-15 11:40:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:31,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:31,928 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 11:40:31,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139660433] [2021-12-15 11:40:31,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139660433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:31,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:31,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:40:31,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179951991] [2021-12-15 11:40:31,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:31,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:40:31,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:31,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:40:31,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:40:31,935 INFO L87 Difference]: Start difference. First operand 474 states and 789 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 11:40:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:31,991 INFO L93 Difference]: Finished difference Result 1040 states and 1729 transitions. [2021-12-15 11:40:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:40:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-15 11:40:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:31,998 INFO L225 Difference]: With dead ends: 1040 [2021-12-15 11:40:31,998 INFO L226 Difference]: Without dead ends: 747 [2021-12-15 11:40:32,000 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 11:40:32,001 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 229 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:32,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1084 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-12-15 11:40:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 743. [2021-12-15 11:40:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.6630727762803235) internal successors, (1234), 742 states have internal predecessors, (1234), 0 states have call successors, (0), 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 11:40:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1234 transitions. [2021-12-15 11:40:32,049 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1234 transitions. Word has length 109 [2021-12-15 11:40:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:32,051 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1234 transitions. [2021-12-15 11:40:32,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 11:40:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1234 transitions. [2021-12-15 11:40:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 11:40:32,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:32,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:32,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:40:32,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1899343221, now seen corresponding path program 1 times [2021-12-15 11:40:32,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:32,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301816884] [2021-12-15 11:40:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:32,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:32,153 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 11:40:32,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301816884] [2021-12-15 11:40:32,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301816884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:32,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:32,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:40:32,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336831287] [2021-12-15 11:40:32,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:32,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:40:32,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:40:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:40:32,158 INFO L87 Difference]: Start difference. First operand 743 states and 1234 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 11:40:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:32,208 INFO L93 Difference]: Finished difference Result 1827 states and 3028 transitions. [2021-12-15 11:40:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:40:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-15 11:40:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:32,215 INFO L225 Difference]: With dead ends: 1827 [2021-12-15 11:40:32,215 INFO L226 Difference]: Without dead ends: 1265 [2021-12-15 11:40:32,218 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 11:40:32,222 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 222 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:32,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1085 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-12-15 11:40:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1259. [2021-12-15 11:40:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 1.6550079491255962) internal successors, (2082), 1258 states have internal predecessors, (2082), 0 states have call successors, (0), 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 11:40:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 2082 transitions. [2021-12-15 11:40:32,277 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 2082 transitions. Word has length 112 [2021-12-15 11:40:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:32,278 INFO L470 AbstractCegarLoop]: Abstraction has 1259 states and 2082 transitions. [2021-12-15 11:40:32,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 11:40:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 2082 transitions. [2021-12-15 11:40:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-15 11:40:32,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:32,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:32,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:40:32,285 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash -634176207, now seen corresponding path program 1 times [2021-12-15 11:40:32,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:32,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161350910] [2021-12-15 11:40:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:32,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:32,364 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 11:40:32,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:32,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161350910] [2021-12-15 11:40:32,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161350910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:32,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:32,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:40:32,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563275648] [2021-12-15 11:40:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:32,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:40:32,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:40:32,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:40:32,367 INFO L87 Difference]: Start difference. First operand 1259 states and 2082 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 11:40:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:32,433 INFO L93 Difference]: Finished difference Result 3335 states and 5500 transitions. [2021-12-15 11:40:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:40:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-12-15 11:40:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:32,443 INFO L225 Difference]: With dead ends: 3335 [2021-12-15 11:40:32,443 INFO L226 Difference]: Without dead ends: 2257 [2021-12-15 11:40:32,447 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 11:40:32,453 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 215 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:32,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1086 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-15 11:40:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2247. [2021-12-15 11:40:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.6447016918967052) internal successors, (3694), 2246 states have internal predecessors, (3694), 0 states have call successors, (0), 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 11:40:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3694 transitions. [2021-12-15 11:40:32,525 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3694 transitions. Word has length 115 [2021-12-15 11:40:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:32,525 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 3694 transitions. [2021-12-15 11:40:32,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 11:40:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3694 transitions. [2021-12-15 11:40:32,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-15 11:40:32,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:32,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:32,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:40:32,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1842996660, now seen corresponding path program 1 times [2021-12-15 11:40:32,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:32,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295978000] [2021-12-15 11:40:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:32,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:32,627 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 11:40:32,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:32,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295978000] [2021-12-15 11:40:32,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295978000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:32,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:32,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:40:32,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715570303] [2021-12-15 11:40:32,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:32,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:40:32,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:40:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:40:32,630 INFO L87 Difference]: Start difference. First operand 2247 states and 3694 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:40:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:33,094 INFO L93 Difference]: Finished difference Result 11827 states and 19558 transitions. [2021-12-15 11:40:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 11:40:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-15 11:40:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:33,126 INFO L225 Difference]: With dead ends: 11827 [2021-12-15 11:40:33,127 INFO L226 Difference]: Without dead ends: 9761 [2021-12-15 11:40:33,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:40:33,134 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 2216 mSDsluCounter, 4159 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2216 SdHoareTripleChecker+Valid, 4710 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:33,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2216 Valid, 4710 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:40:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9761 states. [2021-12-15 11:40:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9761 to 4177. [2021-12-15 11:40:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4177 states, 4176 states have (on average 1.6429597701149425) internal successors, (6861), 4176 states have internal predecessors, (6861), 0 states have call successors, (0), 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 11:40:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4177 states to 4177 states and 6861 transitions. [2021-12-15 11:40:33,368 INFO L78 Accepts]: Start accepts. Automaton has 4177 states and 6861 transitions. Word has length 118 [2021-12-15 11:40:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:33,369 INFO L470 AbstractCegarLoop]: Abstraction has 4177 states and 6861 transitions. [2021-12-15 11:40:33,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:40:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4177 states and 6861 transitions. [2021-12-15 11:40:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-15 11:40:33,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:33,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:33,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:40:33,372 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1365383642, now seen corresponding path program 1 times [2021-12-15 11:40:33,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:33,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311541936] [2021-12-15 11:40:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:33,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:33,459 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 11:40:33,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311541936] [2021-12-15 11:40:33,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311541936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:33,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:33,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:40:33,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768868115] [2021-12-15 11:40:33,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:33,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:40:33,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:40:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:40:33,461 INFO L87 Difference]: Start difference. First operand 4177 states and 6861 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 11:40:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:33,779 INFO L93 Difference]: Finished difference Result 12275 states and 20249 transitions. [2021-12-15 11:40:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:40:33,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-15 11:40:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:33,812 INFO L225 Difference]: With dead ends: 12275 [2021-12-15 11:40:33,812 INFO L226 Difference]: Without dead ends: 8279 [2021-12-15 11:40:33,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:40:33,835 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 754 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:33,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1677 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2021-12-15 11:40:34,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 6211. [2021-12-15 11:40:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6211 states, 6210 states have (on average 1.644766505636071) internal successors, (10214), 6210 states have internal predecessors, (10214), 0 states have call successors, (0), 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 11:40:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6211 states to 6211 states and 10214 transitions. [2021-12-15 11:40:34,166 INFO L78 Accepts]: Start accepts. Automaton has 6211 states and 10214 transitions. Word has length 119 [2021-12-15 11:40:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:34,167 INFO L470 AbstractCegarLoop]: Abstraction has 6211 states and 10214 transitions. [2021-12-15 11:40:34,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 11:40:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6211 states and 10214 transitions. [2021-12-15 11:40:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-15 11:40:34,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:34,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:34,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:40:34,170 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash 560276051, now seen corresponding path program 1 times [2021-12-15 11:40:34,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:34,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367277774] [2021-12-15 11:40:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:34,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:34,229 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 11:40:34,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:34,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367277774] [2021-12-15 11:40:34,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367277774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:34,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:34,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:40:34,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133533792] [2021-12-15 11:40:34,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:34,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:40:34,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:34,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:40:34,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:40:34,231 INFO L87 Difference]: Start difference. First operand 6211 states and 10214 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 11:40:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:34,619 INFO L93 Difference]: Finished difference Result 18273 states and 30109 transitions. [2021-12-15 11:40:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:40:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-15 11:40:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:34,675 INFO L225 Difference]: With dead ends: 18273 [2021-12-15 11:40:34,676 INFO L226 Difference]: Without dead ends: 12243 [2021-12-15 11:40:34,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:40:34,686 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 752 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:34,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 1861 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2021-12-15 11:40:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 9203. [2021-12-15 11:40:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9203 states, 9202 states have (on average 1.6426863725277114) internal successors, (15116), 9202 states have internal predecessors, (15116), 0 states have call successors, (0), 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 11:40:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9203 states to 9203 states and 15116 transitions. [2021-12-15 11:40:35,150 INFO L78 Accepts]: Start accepts. Automaton has 9203 states and 15116 transitions. Word has length 120 [2021-12-15 11:40:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:35,150 INFO L470 AbstractCegarLoop]: Abstraction has 9203 states and 15116 transitions. [2021-12-15 11:40:35,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 11:40:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 9203 states and 15116 transitions. [2021-12-15 11:40:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-15 11:40:35,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:35,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:35,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:40:35,154 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:35,155 INFO L85 PathProgramCache]: Analyzing trace with hash 130742413, now seen corresponding path program 1 times [2021-12-15 11:40:35,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:35,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174493980] [2021-12-15 11:40:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:35,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:35,199 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 11:40:35,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174493980] [2021-12-15 11:40:35,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174493980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:35,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:35,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:40:35,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599845115] [2021-12-15 11:40:35,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:35,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:40:35,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:40:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:40:35,201 INFO L87 Difference]: Start difference. First operand 9203 states and 15116 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:40:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:35,721 INFO L93 Difference]: Finished difference Result 27097 states and 44597 transitions. [2021-12-15 11:40:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:40:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-15 11:40:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:35,769 INFO L225 Difference]: With dead ends: 27097 [2021-12-15 11:40:35,769 INFO L226 Difference]: Without dead ends: 18075 [2021-12-15 11:40:35,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:40:35,788 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 750 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:35,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1864 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2021-12-15 11:40:36,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 13605. [2021-12-15 11:40:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13605 states, 13604 states have (on average 1.6406939135548368) internal successors, (22320), 13604 states have internal predecessors, (22320), 0 states have call successors, (0), 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 11:40:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13605 states to 13605 states and 22320 transitions. [2021-12-15 11:40:36,330 INFO L78 Accepts]: Start accepts. Automaton has 13605 states and 22320 transitions. Word has length 121 [2021-12-15 11:40:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:36,330 INFO L470 AbstractCegarLoop]: Abstraction has 13605 states and 22320 transitions. [2021-12-15 11:40:36,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:40:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 13605 states and 22320 transitions. [2021-12-15 11:40:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 11:40:36,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:36,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:36,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:40:36,335 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1601966021, now seen corresponding path program 1 times [2021-12-15 11:40:36,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:36,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864307708] [2021-12-15 11:40:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:36,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:36,374 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 11:40:36,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:36,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864307708] [2021-12-15 11:40:36,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864307708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:36,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:36,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:40:36,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661619322] [2021-12-15 11:40:36,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:36,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:40:36,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:40:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:40:36,377 INFO L87 Difference]: Start difference. First operand 13605 states and 22320 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:37,208 INFO L93 Difference]: Finished difference Result 30193 states and 49567 transitions. [2021-12-15 11:40:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:40:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-15 11:40:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:37,249 INFO L225 Difference]: With dead ends: 30193 [2021-12-15 11:40:37,250 INFO L226 Difference]: Without dead ends: 20847 [2021-12-15 11:40:37,263 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 11:40:37,265 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 228 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:37,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1219 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20847 states. [2021-12-15 11:40:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20847 to 20845. [2021-12-15 11:40:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20845 states, 20844 states have (on average 1.6359144118211475) internal successors, (34099), 20844 states have internal predecessors, (34099), 0 states have call successors, (0), 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 11:40:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20845 states to 20845 states and 34099 transitions. [2021-12-15 11:40:37,907 INFO L78 Accepts]: Start accepts. Automaton has 20845 states and 34099 transitions. Word has length 122 [2021-12-15 11:40:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:37,908 INFO L470 AbstractCegarLoop]: Abstraction has 20845 states and 34099 transitions. [2021-12-15 11:40:37,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 20845 states and 34099 transitions. [2021-12-15 11:40:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 11:40:37,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:37,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:37,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:40:37,911 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash 654906329, now seen corresponding path program 1 times [2021-12-15 11:40:37,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:37,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610460357] [2021-12-15 11:40:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:37,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:40:37,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:37,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610460357] [2021-12-15 11:40:37,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610460357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:37,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:37,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:40:37,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160484196] [2021-12-15 11:40:37,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:37,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:40:37,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:37,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:40:37,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:40:37,953 INFO L87 Difference]: Start difference. First operand 20845 states and 34099 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:38,848 INFO L93 Difference]: Finished difference Result 46063 states and 75413 transitions. [2021-12-15 11:40:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:40:38,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-15 11:40:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:38,910 INFO L225 Difference]: With dead ends: 46063 [2021-12-15 11:40:38,911 INFO L226 Difference]: Without dead ends: 31699 [2021-12-15 11:40:38,938 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 11:40:38,939 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 221 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:38,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1186 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31699 states. [2021-12-15 11:40:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31699 to 31697. [2021-12-15 11:40:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31697 states, 31696 states have (on average 1.6305212014134276) internal successors, (51681), 31696 states have internal predecessors, (51681), 0 states have call successors, (0), 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 11:40:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31697 states to 31697 states and 51681 transitions. [2021-12-15 11:40:40,156 INFO L78 Accepts]: Start accepts. Automaton has 31697 states and 51681 transitions. Word has length 122 [2021-12-15 11:40:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:40,157 INFO L470 AbstractCegarLoop]: Abstraction has 31697 states and 51681 transitions. [2021-12-15 11:40:40,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 31697 states and 51681 transitions. [2021-12-15 11:40:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 11:40:40,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:40,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:40,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:40:40,161 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:40,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1423805753, now seen corresponding path program 1 times [2021-12-15 11:40:40,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:40,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826289510] [2021-12-15 11:40:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:40,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:40,214 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 11:40:40,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:40,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826289510] [2021-12-15 11:40:40,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826289510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:40,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:40,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:40:40,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879726972] [2021-12-15 11:40:40,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:40,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:40:40,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:40:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:40:40,216 INFO L87 Difference]: Start difference. First operand 31697 states and 51681 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:41,650 INFO L93 Difference]: Finished difference Result 61873 states and 101007 transitions. [2021-12-15 11:40:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:40:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-15 11:40:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:41,734 INFO L225 Difference]: With dead ends: 61873 [2021-12-15 11:40:41,735 INFO L226 Difference]: Without dead ends: 44427 [2021-12-15 11:40:41,768 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 11:40:41,769 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 214 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:41,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 1154 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44427 states. [2021-12-15 11:40:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44427 to 44425. [2021-12-15 11:40:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44425 states, 44424 states have (on average 1.6254051863857375) internal successors, (72207), 44424 states have internal predecessors, (72207), 0 states have call successors, (0), 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 11:40:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44425 states to 44425 states and 72207 transitions. [2021-12-15 11:40:43,467 INFO L78 Accepts]: Start accepts. Automaton has 44425 states and 72207 transitions. Word has length 122 [2021-12-15 11:40:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:43,468 INFO L470 AbstractCegarLoop]: Abstraction has 44425 states and 72207 transitions. [2021-12-15 11:40:43,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 44425 states and 72207 transitions. [2021-12-15 11:40:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 11:40:43,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:43,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:43,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:40:43,472 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:43,473 INFO L85 PathProgramCache]: Analyzing trace with hash -295340454, now seen corresponding path program 1 times [2021-12-15 11:40:43,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:43,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409952684] [2021-12-15 11:40:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:43,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:43,531 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 11:40:43,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:43,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409952684] [2021-12-15 11:40:43,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409952684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:43,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:43,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:40:43,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226383097] [2021-12-15 11:40:43,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:43,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:40:43,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:40:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:40:43,534 INFO L87 Difference]: Start difference. First operand 44425 states and 72207 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:46,802 INFO L93 Difference]: Finished difference Result 141581 states and 230498 transitions. [2021-12-15 11:40:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:40:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-15 11:40:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:47,031 INFO L225 Difference]: With dead ends: 141581 [2021-12-15 11:40:47,031 INFO L226 Difference]: Without dead ends: 97557 [2021-12-15 11:40:47,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:40:47,125 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 748 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:47,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 1862 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97557 states. [2021-12-15 11:40:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97557 to 70857. [2021-12-15 11:40:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70857 states, 70856 states have (on average 1.6216975273794738) internal successors, (114907), 70856 states have internal predecessors, (114907), 0 states have call successors, (0), 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 11:40:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70857 states to 70857 states and 114907 transitions. [2021-12-15 11:40:50,534 INFO L78 Accepts]: Start accepts. Automaton has 70857 states and 114907 transitions. Word has length 122 [2021-12-15 11:40:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:50,534 INFO L470 AbstractCegarLoop]: Abstraction has 70857 states and 114907 transitions. [2021-12-15 11:40:50,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 70857 states and 114907 transitions. [2021-12-15 11:40:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 11:40:50,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:50,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:50,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:40:50,537 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash -845896115, now seen corresponding path program 1 times [2021-12-15 11:40:50,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:50,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552086935] [2021-12-15 11:40:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:50,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:50,574 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 11:40:50,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:50,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552086935] [2021-12-15 11:40:50,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552086935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:50,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:50,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:40:50,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881197328] [2021-12-15 11:40:50,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:50,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:40:50,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:50,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:40:50,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:40:50,577 INFO L87 Difference]: Start difference. First operand 70857 states and 114907 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:40:54,289 INFO L93 Difference]: Finished difference Result 156070 states and 254317 transitions. [2021-12-15 11:40:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:40:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-15 11:40:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:40:54,653 INFO L225 Difference]: With dead ends: 156070 [2021-12-15 11:40:54,653 INFO L226 Difference]: Without dead ends: 105855 [2021-12-15 11:40:54,706 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 11:40:54,713 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 235 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:40:54,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1265 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:40:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105855 states. [2021-12-15 11:40:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105855 to 105853. [2021-12-15 11:40:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105853 states, 105852 states have (on average 1.6188357329101009) internal successors, (171357), 105852 states have internal predecessors, (171357), 0 states have call successors, (0), 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 11:40:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105853 states to 105853 states and 171357 transitions. [2021-12-15 11:40:59,663 INFO L78 Accepts]: Start accepts. Automaton has 105853 states and 171357 transitions. Word has length 122 [2021-12-15 11:40:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:40:59,663 INFO L470 AbstractCegarLoop]: Abstraction has 105853 states and 171357 transitions. [2021-12-15 11:40:59,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:40:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 105853 states and 171357 transitions. [2021-12-15 11:40:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 11:40:59,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:40:59,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:40:59,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:40:59,666 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:40:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:40:59,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1871640245, now seen corresponding path program 1 times [2021-12-15 11:40:59,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:40:59,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346909685] [2021-12-15 11:40:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:40:59,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:40:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:40:59,816 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 11:40:59,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:40:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346909685] [2021-12-15 11:40:59,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346909685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:40:59,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:40:59,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:40:59,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187801029] [2021-12-15 11:40:59,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:40:59,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:40:59,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:40:59,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:40:59,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:40:59,819 INFO L87 Difference]: Start difference. First operand 105853 states and 171357 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:41:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:41:04,742 INFO L93 Difference]: Finished difference Result 211459 states and 342310 transitions. [2021-12-15 11:41:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:41:04,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-15 11:41:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:41:05,098 INFO L225 Difference]: With dead ends: 211459 [2021-12-15 11:41:05,099 INFO L226 Difference]: Without dead ends: 105855 [2021-12-15 11:41:05,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:41:05,243 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 1018 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:41:05,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 2126 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:41:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105855 states.