/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:41:47,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:41:47,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:41:47,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:41:47,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:41:47,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:41:47,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:41:47,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:41:47,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:41:47,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:41:47,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:41:47,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:41:47,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:41:47,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:41:47,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:41:47,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:41:47,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:41:47,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:41:47,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:41:48,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:41:48,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:41:48,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:41:48,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:41:48,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:41:48,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:41:48,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:41:48,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:41:48,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:41:48,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:41:48,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:41:48,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:41:48,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:41:48,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:41:48,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:41:48,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:41:48,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:41:48,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:41:48,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:41:48,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:41:48,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:41:48,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:41:48,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:41:48,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:41:48,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:41:48,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:41:48,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:41:48,085 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:41:48,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:41:48,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:41:48,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:41:48,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:41:48,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:41:48,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:41:48,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:41:48,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:41:48,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:41:48,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:41:48,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:41:48,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:41:48,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:41:48,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:41:48,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:41:48,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:41:48,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:41:48,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:41:48,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:41:48,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:41:48,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:41:48,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:41:48,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:41:48,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:41:48,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:41:48,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:41:48,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:41:48,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:41:48,408 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:41:48,409 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:41:48,410 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 16:41:48,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1da4fdc2/533801dbe89f42daba8ae3b9ea06fb26/FLAGbb0d28f83 [2020-08-21 16:41:49,009 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:41:49,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 16:41:49,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1da4fdc2/533801dbe89f42daba8ae3b9ea06fb26/FLAGbb0d28f83 [2020-08-21 16:41:49,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1da4fdc2/533801dbe89f42daba8ae3b9ea06fb26 [2020-08-21 16:41:49,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:41:49,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:41:49,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:41:49,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:41:49,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:41:49,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:41:49" (1/1) ... [2020-08-21 16:41:49,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e04f8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:49, skipping insertion in model container [2020-08-21 16:41:49,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:41:49" (1/1) ... [2020-08-21 16:41:49,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:41:49,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:41:49,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:41:49,907 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:41:50,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:41:50,081 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:41:50,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50 WrapperNode [2020-08-21 16:41:50,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:41:50,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:41:50,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:41:50,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:41:50,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (1/1) ... [2020-08-21 16:41:50,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (1/1) ... [2020-08-21 16:41:50,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (1/1) ... [2020-08-21 16:41:50,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (1/1) ... [2020-08-21 16:41:50,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (1/1) ... [2020-08-21 16:41:50,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (1/1) ... [2020-08-21 16:41:50,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (1/1) ... [2020-08-21 16:41:50,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:41:50,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:41:50,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:41:50,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:41:50,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:41:50,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:41:50,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:41:50,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:41:50,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:41:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:41:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 16:41:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-21 16:41:50,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 16:41:50,280 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 16:41:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:41:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:41:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 16:41:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 16:41:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 16:41:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 16:41:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 16:41:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 16:41:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 16:41:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:41:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:41:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:41:51,618 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:41:51,618 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 16:41:51,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:41:51 BoogieIcfgContainer [2020-08-21 16:41:51,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:41:51,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:41:51,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:41:51,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:41:51,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:41:49" (1/3) ... [2020-08-21 16:41:51,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc66dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:41:51, skipping insertion in model container [2020-08-21 16:41:51,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:41:50" (2/3) ... [2020-08-21 16:41:51,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc66dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:41:51, skipping insertion in model container [2020-08-21 16:41:51,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:41:51" (3/3) ... [2020-08-21 16:41:51,633 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 16:41:51,644 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:41:51,652 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:41:51,666 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:41:51,695 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:41:51,695 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:41:51,696 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:41:51,696 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:41:51,696 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:41:51,696 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:41:51,696 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:41:51,697 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:41:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2020-08-21 16:41:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-21 16:41:51,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:51,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:41:51,738 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1095322417, now seen corresponding path program 1 times [2020-08-21 16:41:51,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:51,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150283128] [2020-08-21 16:41:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:52,665 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:41:52,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:41:52,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150283128] [2020-08-21 16:41:52,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:41:52,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:41:52,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481415205] [2020-08-21 16:41:52,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:41:52,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:52,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:41:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:41:52,765 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2020-08-21 16:41:53,011 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-08-21 16:41:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:54,575 INFO L93 Difference]: Finished difference Result 635 states and 1108 transitions. [2020-08-21 16:41:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:41:54,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-08-21 16:41:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:54,597 INFO L225 Difference]: With dead ends: 635 [2020-08-21 16:41:54,597 INFO L226 Difference]: Without dead ends: 508 [2020-08-21 16:41:54,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:41:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-08-21 16:41:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 506. [2020-08-21 16:41:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-08-21 16:41:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 755 transitions. [2020-08-21 16:41:54,719 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 755 transitions. Word has length 144 [2020-08-21 16:41:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:54,721 INFO L479 AbstractCegarLoop]: Abstraction has 506 states and 755 transitions. [2020-08-21 16:41:54,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:41:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 755 transitions. [2020-08-21 16:41:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-21 16:41:54,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:54,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:41:54,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:41:54,734 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:54,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2000756509, now seen corresponding path program 1 times [2020-08-21 16:41:54,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:54,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761189272] [2020-08-21 16:41:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:55,191 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:41:55,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:41:55,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761189272] [2020-08-21 16:41:55,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:41:55,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:41:55,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969268180] [2020-08-21 16:41:55,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:41:55,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:55,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:41:55,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:41:55,245 INFO L87 Difference]: Start difference. First operand 506 states and 755 transitions. Second operand 5 states. [2020-08-21 16:41:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:57,554 INFO L93 Difference]: Finished difference Result 1469 states and 2190 transitions. [2020-08-21 16:41:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:41:57,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-08-21 16:41:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:57,562 INFO L225 Difference]: With dead ends: 1469 [2020-08-21 16:41:57,562 INFO L226 Difference]: Without dead ends: 976 [2020-08-21 16:41:57,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:41:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-08-21 16:41:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2020-08-21 16:41:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 974 states. [2020-08-21 16:41:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1440 transitions. [2020-08-21 16:41:57,651 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1440 transitions. Word has length 144 [2020-08-21 16:41:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:57,652 INFO L479 AbstractCegarLoop]: Abstraction has 974 states and 1440 transitions. [2020-08-21 16:41:57,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:41:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1440 transitions. [2020-08-21 16:41:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 16:41:57,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:57,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:41:57,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:41:57,661 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:57,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:57,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1147444865, now seen corresponding path program 1 times [2020-08-21 16:41:57,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:57,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349295791] [2020-08-21 16:41:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:57,921 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:41:57,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:41:57,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349295791] [2020-08-21 16:41:57,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:41:57,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:41:57,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158152319] [2020-08-21 16:41:57,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:41:57,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:57,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:41:57,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:41:58,000 INFO L87 Difference]: Start difference. First operand 974 states and 1440 transitions. Second operand 4 states. [2020-08-21 16:42:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:42:00,550 INFO L93 Difference]: Finished difference Result 2876 states and 4250 transitions. [2020-08-21 16:42:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:42:00,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-08-21 16:42:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:42:00,561 INFO L225 Difference]: With dead ends: 2876 [2020-08-21 16:42:00,561 INFO L226 Difference]: Without dead ends: 1934 [2020-08-21 16:42:00,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:42:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-08-21 16:42:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 976. [2020-08-21 16:42:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-08-21 16:42:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1442 transitions. [2020-08-21 16:42:00,651 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1442 transitions. Word has length 145 [2020-08-21 16:42:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:42:00,651 INFO L479 AbstractCegarLoop]: Abstraction has 976 states and 1442 transitions. [2020-08-21 16:42:00,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:42:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1442 transitions. [2020-08-21 16:42:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 16:42:00,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:00,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:42:00,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:42:00,658 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash 772973737, now seen corresponding path program 1 times [2020-08-21 16:42:00,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:00,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947256992] [2020-08-21 16:42:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:01,056 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:42:01,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:42:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:42:01,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947256992] [2020-08-21 16:42:01,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:42:01,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:42:01,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629283630] [2020-08-21 16:42:01,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:42:01,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:42:01,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:42:01,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:42:01,119 INFO L87 Difference]: Start difference. First operand 976 states and 1442 transitions. Second operand 4 states. [2020-08-21 16:42:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:42:03,333 INFO L93 Difference]: Finished difference Result 2694 states and 3993 transitions. [2020-08-21 16:42:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:42:03,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 16:42:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:42:03,344 INFO L225 Difference]: With dead ends: 2694 [2020-08-21 16:42:03,344 INFO L226 Difference]: Without dead ends: 1886 [2020-08-21 16:42:03,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:42:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2020-08-21 16:42:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1884. [2020-08-21 16:42:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-08-21 16:42:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2759 transitions. [2020-08-21 16:42:03,467 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2759 transitions. Word has length 146 [2020-08-21 16:42:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:42:03,467 INFO L479 AbstractCegarLoop]: Abstraction has 1884 states and 2759 transitions. [2020-08-21 16:42:03,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:42:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2759 transitions. [2020-08-21 16:42:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 16:42:03,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:03,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:42:03,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:42:03,473 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:03,474 INFO L82 PathProgramCache]: Analyzing trace with hash -283367418, now seen corresponding path program 1 times [2020-08-21 16:42:03,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:03,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603432699] [2020-08-21 16:42:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:03,860 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:42:03,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:42:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:42:03,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603432699] [2020-08-21 16:42:03,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:42:03,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:42:03,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334646436] [2020-08-21 16:42:03,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:42:03,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:42:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:42:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:42:03,910 INFO L87 Difference]: Start difference. First operand 1884 states and 2759 transitions. Second operand 5 states. [2020-08-21 16:42:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:42:05,490 INFO L93 Difference]: Finished difference Result 3946 states and 5724 transitions. [2020-08-21 16:42:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:42:05,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 16:42:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:42:05,500 INFO L225 Difference]: With dead ends: 3946 [2020-08-21 16:42:05,501 INFO L226 Difference]: Without dead ends: 2020 [2020-08-21 16:42:05,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:42:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-08-21 16:42:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2018. [2020-08-21 16:42:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2018 states. [2020-08-21 16:42:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2909 transitions. [2020-08-21 16:42:05,592 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2909 transitions. Word has length 146 [2020-08-21 16:42:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:42:05,593 INFO L479 AbstractCegarLoop]: Abstraction has 2018 states and 2909 transitions. [2020-08-21 16:42:05,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:42:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2909 transitions. [2020-08-21 16:42:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 16:42:05,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:05,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:42:05,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:42:05,597 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:05,599 INFO L82 PathProgramCache]: Analyzing trace with hash -233310428, now seen corresponding path program 1 times [2020-08-21 16:42:05,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:05,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908343949] [2020-08-21 16:42:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:05,904 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:42:05,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:42:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:42:05,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908343949] [2020-08-21 16:42:05,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:42:05,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:42:05,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793913515] [2020-08-21 16:42:05,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:42:05,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:42:05,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:42:05,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:42:05,946 INFO L87 Difference]: Start difference. First operand 2018 states and 2909 transitions. Second operand 5 states. [2020-08-21 16:42:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:42:08,048 INFO L93 Difference]: Finished difference Result 5812 states and 8329 transitions. [2020-08-21 16:42:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:42:08,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 16:42:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:42:08,067 INFO L225 Difference]: With dead ends: 5812 [2020-08-21 16:42:08,067 INFO L226 Difference]: Without dead ends: 3866 [2020-08-21 16:42:08,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:42:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2020-08-21 16:42:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 3864. [2020-08-21 16:42:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3864 states. [2020-08-21 16:42:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 5487 transitions. [2020-08-21 16:42:08,257 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 5487 transitions. Word has length 146 [2020-08-21 16:42:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:42:08,258 INFO L479 AbstractCegarLoop]: Abstraction has 3864 states and 5487 transitions. [2020-08-21 16:42:08,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:42:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 5487 transitions. [2020-08-21 16:42:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 16:42:08,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:08,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:42:08,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:42:08,266 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1612159712, now seen corresponding path program 1 times [2020-08-21 16:42:08,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:08,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250952549] [2020-08-21 16:42:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:08,468 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:42:08,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:42:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:42:08,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250952549] [2020-08-21 16:42:08,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:42:08,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:42:08,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918539222] [2020-08-21 16:42:08,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:42:08,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:42:08,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:42:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:42:08,518 INFO L87 Difference]: Start difference. First operand 3864 states and 5487 transitions. Second operand 4 states. [2020-08-21 16:42:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:42:09,977 INFO L93 Difference]: Finished difference Result 11398 states and 16157 transitions. [2020-08-21 16:42:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:42:09,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-21 16:42:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:42:10,006 INFO L225 Difference]: With dead ends: 11398 [2020-08-21 16:42:10,006 INFO L226 Difference]: Without dead ends: 7650 [2020-08-21 16:42:10,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:42:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2020-08-21 16:42:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 3876. [2020-08-21 16:42:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3876 states. [2020-08-21 16:42:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 5499 transitions. [2020-08-21 16:42:10,292 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 5499 transitions. Word has length 147 [2020-08-21 16:42:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:42:10,293 INFO L479 AbstractCegarLoop]: Abstraction has 3876 states and 5499 transitions. [2020-08-21 16:42:10,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:42:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 5499 transitions. [2020-08-21 16:42:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 16:42:10,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:10,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:42:10,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:42:10,303 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash -228892187, now seen corresponding path program 1 times [2020-08-21 16:42:10,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:10,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195719378] [2020-08-21 16:42:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:10,567 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:42:10,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:42:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:42:10,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195719378] [2020-08-21 16:42:10,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:42:10,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:42:10,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935929120] [2020-08-21 16:42:10,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:42:10,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:42:10,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:42:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:42:10,619 INFO L87 Difference]: Start difference. First operand 3876 states and 5499 transitions. Second operand 5 states. [2020-08-21 16:42:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:42:12,814 INFO L93 Difference]: Finished difference Result 10516 states and 14827 transitions. [2020-08-21 16:42:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:42:12,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-21 16:42:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:42:12,839 INFO L225 Difference]: With dead ends: 10516 [2020-08-21 16:42:12,839 INFO L226 Difference]: Without dead ends: 6766 [2020-08-21 16:42:12,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:42:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6766 states. [2020-08-21 16:42:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6766 to 6764. [2020-08-21 16:42:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6764 states. [2020-08-21 16:42:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 9415 transitions. [2020-08-21 16:42:13,173 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 9415 transitions. Word has length 148 [2020-08-21 16:42:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:42:13,175 INFO L479 AbstractCegarLoop]: Abstraction has 6764 states and 9415 transitions. [2020-08-21 16:42:13,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:42:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 9415 transitions. [2020-08-21 16:42:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 16:42:13,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:13,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:42:13,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:42:13,193 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1183404296, now seen corresponding path program 1 times [2020-08-21 16:42:13,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:13,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669747595] [2020-08-21 16:42:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:13,492 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:42:13,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:42:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:42:13,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669747595] [2020-08-21 16:42:13,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:42:13,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:42:13,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47778916] [2020-08-21 16:42:13,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:42:13,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:42:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:42:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:42:13,592 INFO L87 Difference]: Start difference. First operand 6764 states and 9415 transitions. Second operand 5 states. [2020-08-21 16:42:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:42:16,142 INFO L93 Difference]: Finished difference Result 18785 states and 26235 transitions. [2020-08-21 16:42:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:42:16,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 16:42:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:42:16,168 INFO L225 Difference]: With dead ends: 18785 [2020-08-21 16:42:16,168 INFO L226 Difference]: Without dead ends: 12331 [2020-08-21 16:42:16,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:42:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12331 states. [2020-08-21 16:42:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12331 to 12329. [2020-08-21 16:42:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12329 states. [2020-08-21 16:42:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12329 states to 12329 states and 17040 transitions. [2020-08-21 16:42:16,638 INFO L78 Accepts]: Start accepts. Automaton has 12329 states and 17040 transitions. Word has length 150 [2020-08-21 16:42:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:42:16,639 INFO L479 AbstractCegarLoop]: Abstraction has 12329 states and 17040 transitions. [2020-08-21 16:42:16,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:42:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 12329 states and 17040 transitions. [2020-08-21 16:42:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 16:42:16,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:16,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:42:16,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:42:16,654 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:16,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1614355888, now seen corresponding path program 1 times [2020-08-21 16:42:16,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:16,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217072696] [2020-08-21 16:42:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:17,022 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 16:42:17,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:42:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:42:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:42:17,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217072696] [2020-08-21 16:42:17,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:42:17,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:42:17,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575765757] [2020-08-21 16:42:17,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:42:17,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:42:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:42:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:42:17,076 INFO L87 Difference]: Start difference. First operand 12329 states and 17040 transitions. Second operand 5 states. [2020-08-21 16:42:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:42:19,505 INFO L93 Difference]: Finished difference Result 18021 states and 24886 transitions. [2020-08-21 16:42:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:42:19,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 16:42:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:42:19,532 INFO L225 Difference]: With dead ends: 18021 [2020-08-21 16:42:19,532 INFO L226 Difference]: Without dead ends: 12331 [2020-08-21 16:42:19,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:42:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12331 states. [2020-08-21 16:42:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12331 to 12076. [2020-08-21 16:42:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12076 states. [2020-08-21 16:42:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12076 states to 12076 states and 16690 transitions. [2020-08-21 16:42:20,062 INFO L78 Accepts]: Start accepts. Automaton has 12076 states and 16690 transitions. Word has length 150 [2020-08-21 16:42:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:42:20,062 INFO L479 AbstractCegarLoop]: Abstraction has 12076 states and 16690 transitions. [2020-08-21 16:42:20,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:42:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 12076 states and 16690 transitions. [2020-08-21 16:42:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 16:42:20,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:20,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:42:20,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:42:20,074 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:20,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1163108058, now seen corresponding path program 1 times [2020-08-21 16:42:20,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:20,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521113860] [2020-08-21 16:42:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:42:20,129 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:42:20,129 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:42:20,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:42:20,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:42:20 BoogieIcfgContainer [2020-08-21 16:42:20,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:42:20,179 INFO L168 Benchmark]: Toolchain (without parser) took 30864.26 ms. Allocated memory was 137.4 MB in the beginning and 731.4 MB in the end (delta: 594.0 MB). Free memory was 99.5 MB in the beginning and 52.3 MB in the end (delta: 47.2 MB). Peak memory consumption was 641.2 MB. Max. memory is 7.1 GB. [2020-08-21 16:42:20,180 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:42:20,181 INFO L168 Benchmark]: CACSL2BoogieTranslator took 766.31 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 99.3 MB in the beginning and 170.2 MB in the end (delta: -70.8 MB). Peak memory consumption was 35.8 MB. Max. memory is 7.1 GB. [2020-08-21 16:42:20,182 INFO L168 Benchmark]: Boogie Preprocessor took 87.64 ms. Allocated memory is still 201.3 MB. Free memory was 170.2 MB in the beginning and 165.7 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:42:20,182 INFO L168 Benchmark]: RCFGBuilder took 1454.39 ms. Allocated memory was 201.3 MB in the beginning and 230.7 MB in the end (delta: 29.4 MB). Free memory was 165.7 MB in the beginning and 159.0 MB in the end (delta: 6.7 MB). Peak memory consumption was 88.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:42:20,183 INFO L168 Benchmark]: TraceAbstraction took 28551.40 ms. Allocated memory was 230.7 MB in the beginning and 731.4 MB in the end (delta: 500.7 MB). Free memory was 159.0 MB in the beginning and 52.3 MB in the end (delta: 106.7 MB). Peak memory consumption was 607.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:42:20,186 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 766.31 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 99.3 MB in the beginning and 170.2 MB in the end (delta: -70.8 MB). Peak memory consumption was 35.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.64 ms. Allocated memory is still 201.3 MB. Free memory was 170.2 MB in the beginning and 165.7 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1454.39 ms. Allocated memory was 201.3 MB in the beginning and 230.7 MB in the end (delta: 29.4 MB). Free memory was 165.7 MB in the beginning and 159.0 MB in the end (delta: 6.7 MB). Peak memory consumption was 88.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28551.40 ms. Allocated memory was 230.7 MB in the beginning and 731.4 MB in the end (delta: 500.7 MB). Free memory was 159.0 MB in the beginning and 52.3 MB in the end (delta: 106.7 MB). Peak memory consumption was 607.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 832]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1] int __return_main; [L15] msg_t nomsg = (msg_t )-1; [L16] port_t p12 = 0; [L17] char p12_old = '\x0'; [L18] char p12_new = '\x0'; [L19] _Bool ep12 = 0; [L20] port_t p13 = 0; [L21] char p13_old = '\x0'; [L22] char p13_new = '\x0'; [L23] _Bool ep13 = 0; [L24] port_t p21 = 0; [L25] char p21_old = '\x0'; [L26] char p21_new = '\x0'; [L27] _Bool ep21 = 0; [L28] port_t p23 = 0; [L29] char p23_old = '\x0'; [L30] char p23_new = '\x0'; [L31] _Bool ep23 = 0; [L32] port_t p31 = 0; [L33] char p31_old = '\x0'; [L34] char p31_new = '\x0'; [L35] _Bool ep31 = 0; [L36] port_t p32 = 0; [L37] char p32_old = '\x0'; [L38] char p32_new = '\x0'; [L39] _Bool ep32 = 0; [L40] char id1 = '\x0'; [L41] unsigned char r1 = '\x0'; [L42] char st1 = '\x0'; [L43] char nl1 = '\x0'; [L44] char m1 = '\x0'; [L45] char max1 = '\x0'; [L46] _Bool mode1 = 0; [L47] char id2 = '\x0'; [L48] unsigned char r2 = '\x0'; [L49] char st2 = '\x0'; [L50] char nl2 = '\x0'; [L51] char m2 = '\x0'; [L52] char max2 = '\x0'; [L53] _Bool mode2 = 0; [L54] char id3 = '\x0'; [L55] unsigned char r3 = '\x0'; [L56] char st3 = '\x0'; [L57] char nl3 = '\x0'; [L58] char m3 = '\x0'; [L59] char max3 = '\x0'; [L60] _Bool mode3 = 0; [L64] void (*nodes[3])() = { &node1, &node2, &node3 }; [L68] int __return_1718; [L69] int __return_1846; [L70] int __return_1964; [L71] int __return_2082; [L72] int __return_2205; [L73] int __return_2315; [L76] int main__c1; [L77] int main__i2; [L78] main__c1 = 0 [L79] ep12 = __VERIFIER_nondet_bool() [L80] ep13 = __VERIFIER_nondet_bool() [L81] ep21 = __VERIFIER_nondet_bool() [L82] ep23 = __VERIFIER_nondet_bool() [L83] ep31 = __VERIFIER_nondet_bool() [L84] ep32 = __VERIFIER_nondet_bool() [L85] id1 = __VERIFIER_nondet_char() [L86] r1 = __VERIFIER_nondet_uchar() [L87] st1 = __VERIFIER_nondet_char() [L88] nl1 = __VERIFIER_nondet_char() [L89] m1 = __VERIFIER_nondet_char() [L90] max1 = __VERIFIER_nondet_char() [L91] mode1 = __VERIFIER_nondet_bool() [L92] id2 = __VERIFIER_nondet_char() [L93] r2 = __VERIFIER_nondet_uchar() [L94] st2 = __VERIFIER_nondet_char() [L95] nl2 = __VERIFIER_nondet_char() [L96] m2 = __VERIFIER_nondet_char() [L97] max2 = __VERIFIER_nondet_char() [L98] mode2 = __VERIFIER_nondet_bool() [L99] id3 = __VERIFIER_nondet_char() [L100] r3 = __VERIFIER_nondet_uchar() [L101] st3 = __VERIFIER_nondet_char() [L102] nl3 = __VERIFIER_nondet_char() [L103] m3 = __VERIFIER_nondet_char() [L104] max3 = __VERIFIER_nondet_char() [L105] mode3 = __VERIFIER_nondet_bool() [L107] _Bool init__r121; [L108] _Bool init__r131; [L109] _Bool init__r211; [L110] _Bool init__r231; [L111] _Bool init__r311; [L112] _Bool init__r321; [L113] _Bool init__r122; [L114] int init__tmp; [L115] _Bool init__r132; [L116] int init__tmp___0; [L117] _Bool init__r212; [L118] int init__tmp___1; [L119] _Bool init__r232; [L120] int init__tmp___2; [L121] _Bool init__r312; [L122] int init__tmp___3; [L123] _Bool init__r322; [L124] int init__tmp___4; [L125] int init__tmp___5; [L126] init__r121 = ep12 [L127] init__r131 = ep13 [L128] init__r211 = ep21 [L129] init__r231 = ep23 [L130] init__r311 = ep31 [L131] init__r321 = ep32 [L132] COND FALSE !(!(init__r121 == 0)) [L2244] COND FALSE !(!(init__r131 == 0)) [L2260] init__tmp = 0 [L136] init__r122 = (_Bool)init__tmp [L137] COND FALSE !(!(init__r131 == 0)) [L2221] COND FALSE !(!(init__r121 == 0)) [L2237] init__tmp___0 = 0 [L141] init__r132 = (_Bool)init__tmp___0 [L142] COND FALSE !(!(init__r211 == 0)) [L2198] COND FALSE !(!(init__r231 == 0)) [L2214] init__tmp___1 = 0 [L146] init__r212 = (_Bool)init__tmp___1 [L147] COND FALSE !(!(init__r231 == 0)) [L2175] COND FALSE !(!(init__r211 == 0)) [L2191] init__tmp___2 = 0 [L151] init__r232 = (_Bool)init__tmp___2 [L152] COND FALSE !(!(init__r311 == 0)) [L2152] COND FALSE !(!(init__r321 == 0)) [L2168] init__tmp___3 = 0 [L156] init__r312 = (_Bool)init__tmp___3 [L157] COND FALSE !(!(init__r321 == 0)) [L2129] COND FALSE !(!(init__r311 == 0)) [L2145] init__tmp___4 = 0 [L161] init__r322 = (_Bool)init__tmp___4 [L162] COND TRUE ((int)id1) != ((int)id2) [L164] COND TRUE ((int)id1) != ((int)id3) [L166] COND TRUE ((int)id2) != ((int)id3) [L168] COND TRUE ((int)id1) >= 0 [L170] COND TRUE ((int)id2) >= 0 [L172] COND TRUE ((int)id3) >= 0 [L174] COND TRUE ((int)r1) == 0 [L176] COND TRUE ((int)r2) == 0 [L178] COND TRUE ((int)r3) == 0 [L180] COND TRUE ((int)max1) == ((int)id1) [L182] COND TRUE ((int)max2) == ((int)id2) [L184] COND TRUE ((int)max3) == ((int)id3) [L186] COND TRUE ((int)st1) == 0 [L188] COND TRUE ((int)st2) == 0 [L190] COND TRUE ((int)st3) == 0 [L192] COND TRUE ((int)nl1) == 0 [L194] COND TRUE ((int)nl2) == 0 [L196] COND TRUE ((int)nl3) == 0 [L198] COND TRUE ((int)mode1) == 0 [L200] COND TRUE ((int)mode2) == 0 [L202] COND TRUE ((int)mode3) == 0 [L204] init__tmp___5 = 1 [L205] __return_1718 = init__tmp___5 [L206] main__i2 = __return_1718 [L207] COND TRUE main__i2 != 0 [L209] p12_old = nomsg [L210] p12_new = nomsg [L211] p13_old = nomsg [L212] p13_new = nomsg [L213] p21_old = nomsg [L214] p21_new = nomsg [L215] p23_old = nomsg [L216] p23_new = nomsg [L217] p31_old = nomsg [L218] p31_new = nomsg [L219] p32_old = nomsg [L220] p32_new = nomsg [L221] main__i2 = 0 [L223] COND FALSE !(!(mode1 == 0)) [L229] COND TRUE ((int)r1) < 2 [L231] COND FALSE !(!(ep12 == 0)) [L242] COND FALSE !(!(ep13 == 0)) [L253] mode1 = 1 [L255] COND FALSE !(!(mode2 == 0)) [L261] COND TRUE ((int)r2) < 2 [L263] COND FALSE !(!(ep21 == 0)) [L274] COND FALSE !(!(ep23 == 0)) [L285] mode2 = 1 [L287] COND FALSE !(!(mode3 == 0)) [L293] COND TRUE ((int)r3) < 2 [L295] COND FALSE !(!(ep31 == 0)) [L306] COND FALSE !(!(ep32 == 0)) [L317] mode3 = 1 [L318] p12_old = p12_new [L319] p12_new = nomsg [L320] p13_old = p13_new [L321] p13_new = nomsg [L322] p21_old = p21_new [L323] p21_new = nomsg [L324] p23_old = p23_new [L325] p23_new = nomsg [L326] p31_old = p31_new [L327] p31_new = nomsg [L328] p32_old = p32_new [L329] p32_new = nomsg [L331] int check__tmp; [L332] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L334] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L336] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L338] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L340] COND FALSE !(((int)r1) >= 2) [L346] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L348] COND TRUE ((int)r1) < 2 [L350] COND FALSE !(((int)r1) >= 2) [L356] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L358] COND TRUE ((int)r1) < 2 [L360] check__tmp = 1 [L361] __return_1846 = check__tmp [L362] main__c1 = __return_1846 [L364] _Bool __tmp_1; [L365] __tmp_1 = main__c1 [L366] _Bool assert__arg; [L367] assert__arg = __tmp_1 [L368] COND FALSE !(assert__arg == 0) [L375] COND TRUE !(mode1 == 0) [L377] COND FALSE !(r1 == 255) [L383] r1 = r1 + 1 [L384] COND FALSE !(!(ep21 == 0)) [L392] COND FALSE !(!(ep31 == 0)) [L400] COND FALSE !(((int)r1) == 2) [L406] mode1 = 0 [L408] COND TRUE !(mode2 == 0) [L410] COND FALSE !(r2 == 255) [L416] r2 = r2 + 1 [L417] COND FALSE !(!(ep12 == 0)) [L425] COND FALSE !(!(ep32 == 0)) [L433] COND FALSE !(((int)r2) == 2) [L439] mode2 = 0 [L441] COND TRUE !(mode3 == 0) [L443] COND FALSE !(r3 == 255) [L449] r3 = r3 + 1 [L450] COND FALSE !(!(ep13 == 0)) [L458] COND FALSE !(!(ep23 == 0)) [L466] COND FALSE !(((int)r3) == 2) [L472] mode3 = 0 [L473] p12_old = p12_new [L474] p12_new = nomsg [L475] p13_old = p13_new [L476] p13_new = nomsg [L477] p21_old = p21_new [L478] p21_new = nomsg [L479] p23_old = p23_new [L480] p23_new = nomsg [L481] p31_old = p31_new [L482] p31_new = nomsg [L483] p32_old = p32_new [L484] p32_new = nomsg [L486] int check__tmp; [L487] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L489] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L491] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L493] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L495] COND FALSE !(((int)r1) >= 2) [L501] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L503] COND TRUE ((int)r1) < 2 [L505] COND FALSE !(((int)r1) >= 2) [L511] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L513] COND TRUE ((int)r1) < 2 [L515] check__tmp = 1 [L516] __return_1964 = check__tmp [L517] main__c1 = __return_1964 [L519] _Bool __tmp_2; [L520] __tmp_2 = main__c1 [L521] _Bool assert__arg; [L522] assert__arg = __tmp_2 [L523] COND FALSE !(assert__arg == 0) [L530] COND FALSE !(!(mode1 == 0)) [L536] COND TRUE ((int)r1) < 2 [L538] COND FALSE !(!(ep12 == 0)) [L549] COND FALSE !(!(ep13 == 0)) [L560] mode1 = 1 [L562] COND FALSE !(!(mode2 == 0)) [L568] COND TRUE ((int)r2) < 2 [L570] COND FALSE !(!(ep21 == 0)) [L581] COND FALSE !(!(ep23 == 0)) [L592] mode2 = 1 [L594] COND FALSE !(!(mode3 == 0)) [L600] COND TRUE ((int)r3) < 2 [L602] COND FALSE !(!(ep31 == 0)) [L613] COND FALSE !(!(ep32 == 0)) [L624] mode3 = 1 [L625] p12_old = p12_new [L626] p12_new = nomsg [L627] p13_old = p13_new [L628] p13_new = nomsg [L629] p21_old = p21_new [L630] p21_new = nomsg [L631] p23_old = p23_new [L632] p23_new = nomsg [L633] p31_old = p31_new [L634] p31_new = nomsg [L635] p32_old = p32_new [L636] p32_new = nomsg [L638] int check__tmp; [L639] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L641] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L643] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L645] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L647] COND FALSE !(((int)r1) >= 2) [L653] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L655] COND TRUE ((int)r1) < 2 [L657] COND FALSE !(((int)r1) >= 2) [L663] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L665] COND TRUE ((int)r1) < 2 [L667] check__tmp = 1 [L668] __return_2082 = check__tmp [L669] main__c1 = __return_2082 [L671] _Bool __tmp_3; [L672] __tmp_3 = main__c1 [L673] _Bool assert__arg; [L674] assert__arg = __tmp_3 [L675] COND FALSE !(assert__arg == 0) [L682] COND TRUE !(mode1 == 0) [L684] COND FALSE !(r1 == 255) [L690] r1 = r1 + 1 [L691] COND FALSE !(!(ep21 == 0)) [L699] COND FALSE !(!(ep31 == 0)) [L707] COND TRUE ((int)r1) == 2 [L709] COND TRUE ((int)max1) == ((int)id1) [L711] st1 = 1 [L713] mode1 = 0 [L715] COND TRUE !(mode2 == 0) [L717] COND FALSE !(r2 == 255) [L723] r2 = r2 + 1 [L724] COND FALSE !(!(ep12 == 0)) [L732] COND FALSE !(!(ep32 == 0)) [L740] COND TRUE ((int)r2) == 2 [L742] COND TRUE ((int)max2) == ((int)id2) [L744] st2 = 1 [L746] mode2 = 0 [L748] COND TRUE !(mode3 == 0) [L750] COND FALSE !(r3 == 255) [L756] r3 = r3 + 1 [L757] COND FALSE !(!(ep13 == 0)) [L765] COND FALSE !(!(ep23 == 0)) [L773] COND TRUE ((int)r3) == 2 [L775] COND TRUE ((int)max3) == ((int)id3) [L777] st3 = 1 [L779] mode3 = 0 [L780] p12_old = p12_new [L781] p12_new = nomsg [L782] p13_old = p13_new [L783] p13_new = nomsg [L784] p21_old = p21_new [L785] p21_new = nomsg [L786] p23_old = p23_new [L787] p23_new = nomsg [L788] p31_old = p31_new [L789] p31_new = nomsg [L790] p32_old = p32_new [L791] p32_new = nomsg [L793] int check__tmp; [L794] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1433] check__tmp = 0 [L822] __return_2205 = check__tmp [L823] main__c1 = __return_2205 [L826] _Bool __tmp_4; [L827] __tmp_4 = main__c1 [L828] _Bool assert__arg; [L829] assert__arg = __tmp_4 [L830] COND TRUE assert__arg == 0 [L832] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 315 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.4s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 21.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7042 SDtfs, 7164 SDslu, 4179 SDs, 0 SdLazy, 7492 SolverSat, 100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12329occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 5001 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 1616 NumberOfCodeBlocks, 1616 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1456 ConstructedInterpolants, 0 QuantifiedInterpolants, 777929 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...