/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_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:42:50,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:42:50,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:42:50,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:42:50,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:42:50,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:42:50,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:42:50,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:42:50,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:42:50,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:42:50,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:42:50,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:42:50,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:42:50,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:42:50,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:42:50,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:42:50,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:42:50,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:42:50,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:42:50,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:42:50,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:42:50,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:42:50,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:42:50,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:42:50,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:42:50,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:42:50,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:42:50,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:42:50,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:42:50,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:42:50,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:42:50,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:42:50,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:42:50,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:42:50,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:42:50,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:42:50,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:42:50,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:42:50,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:42:50,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:42:50,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:42:50,321 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 16:42:50,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:42:50,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:42:50,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:42:50,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:42:50,357 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:42:50,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:42:50,358 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:42:50,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:42:50,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:42:50,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:42:50,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:42:50,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:42:50,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:42:50,359 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:42:50,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:42:50,359 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:42:50,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:42:50,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:42:50,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:42:50,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:42:50,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:42:50,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:42:50,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:42:50,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:42:50,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:42:50,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:42:50,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:42:50,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:42:50,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:42:50,362 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 16:42:50,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:42:50,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:42:50,684 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:42:50,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:42:50,687 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:42:50,688 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-21 16:42:50,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f72ad538/ff1cd3c32f3946b7a8dc6cdfc1f2a2f7/FLAGade212d09 [2020-08-21 16:42:51,463 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:42:51,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-21 16:42:51,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f72ad538/ff1cd3c32f3946b7a8dc6cdfc1f2a2f7/FLAGade212d09 [2020-08-21 16:42:51,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f72ad538/ff1cd3c32f3946b7a8dc6cdfc1f2a2f7 [2020-08-21 16:42:51,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:42:51,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:42:51,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:42:51,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:42:51,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:42:51,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:42:51" (1/1) ... [2020-08-21 16:42:51,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a250be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:51, skipping insertion in model container [2020-08-21 16:42:51,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:42:51" (1/1) ... [2020-08-21 16:42:51,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:42:51,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:42:53,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:42:53,321 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:42:54,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:42:54,331 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:42:54,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54 WrapperNode [2020-08-21 16:42:54,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:42:54,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:42:54,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:42:54,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:42:54,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (1/1) ... [2020-08-21 16:42:54,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (1/1) ... [2020-08-21 16:42:54,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (1/1) ... [2020-08-21 16:42:54,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (1/1) ... [2020-08-21 16:42:54,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (1/1) ... [2020-08-21 16:42:54,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (1/1) ... [2020-08-21 16:42:54,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (1/1) ... [2020-08-21 16:42:54,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:42:54,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:42:54,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:42:54,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:42:54,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (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 16:42:54,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:42:54,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:42:54,657 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:42:54,658 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:42:54,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:42:54,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 16:42:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-21 16:42:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 16:42:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 16:42:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:42:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:42:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 16:42:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 16:42:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 16:42:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 16:42:54,662 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 16:42:54,662 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-21 16:42:54,662 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 16:42:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 16:42:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:42:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:42:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:42:57,905 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:42:57,906 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 16:42:57,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:42:57 BoogieIcfgContainer [2020-08-21 16:42:57,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:42:57,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:42:57,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:42:57,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:42:57,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:42:51" (1/3) ... [2020-08-21 16:42:57,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d452abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:42:57, skipping insertion in model container [2020-08-21 16:42:57,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:42:54" (2/3) ... [2020-08-21 16:42:57,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d452abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:42:57, skipping insertion in model container [2020-08-21 16:42:57,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:42:57" (3/3) ... [2020-08-21 16:42:57,932 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-21 16:42:57,945 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:42:57,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-08-21 16:42:57,973 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-08-21 16:42:58,003 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:42:58,004 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:42:58,004 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:42:58,004 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:42:58,004 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:42:58,004 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:42:58,004 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:42:58,005 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:42:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states. [2020-08-21 16:42:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 16:42:58,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:42:58,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:58,144 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:42:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:42:58,152 INFO L82 PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times [2020-08-21 16:42:58,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:42:58,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281421618] [2020-08-21 16:42:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:42:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:00,002 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 16:43:00,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:43:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:00,209 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 16:43:00,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281421618] [2020-08-21 16:43:00,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:43:00,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:43:00,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538740374] [2020-08-21 16:43:00,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:43:00,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:43:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:43:00,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:43:00,236 INFO L87 Difference]: Start difference. First operand 1027 states. Second operand 4 states. [2020-08-21 16:43:00,915 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-21 16:43:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:43:08,392 INFO L93 Difference]: Finished difference Result 1794 states and 3183 transitions. [2020-08-21 16:43:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:43:08,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-21 16:43:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:43:08,426 INFO L225 Difference]: With dead ends: 1794 [2020-08-21 16:43:08,427 INFO L226 Difference]: Without dead ends: 1483 [2020-08-21 16:43:08,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:43:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-08-21 16:43:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481. [2020-08-21 16:43:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2020-08-21 16:43:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions. [2020-08-21 16:43:08,606 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327 [2020-08-21 16:43:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:43:08,614 INFO L479 AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions. [2020-08-21 16:43:08,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:43:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions. [2020-08-21 16:43:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 16:43:08,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:43:08,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:08,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:43:08,631 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:43:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:43:08,632 INFO L82 PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times [2020-08-21 16:43:08,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:43:08,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936044384] [2020-08-21 16:43:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:43:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:09,749 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 16:43:09,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:43:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:09,980 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 16:43:09,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936044384] [2020-08-21 16:43:09,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:43:09,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:43:09,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250363559] [2020-08-21 16:43:09,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:43:09,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:43:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:43:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:43:09,985 INFO L87 Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 4 states. [2020-08-21 16:43:10,526 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-21 16:43:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:43:18,004 INFO L93 Difference]: Finished difference Result 2844 states and 4401 transitions. [2020-08-21 16:43:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:43:18,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-21 16:43:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:43:18,027 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 16:43:18,027 INFO L226 Difference]: Without dead ends: 2425 [2020-08-21 16:43:18,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:43:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2020-08-21 16:43:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2423. [2020-08-21 16:43:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2423 states. [2020-08-21 16:43:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3727 transitions. [2020-08-21 16:43:18,162 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3727 transitions. Word has length 327 [2020-08-21 16:43:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:43:18,164 INFO L479 AbstractCegarLoop]: Abstraction has 2423 states and 3727 transitions. [2020-08-21 16:43:18,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:43:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3727 transitions. [2020-08-21 16:43:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 16:43:18,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:43:18,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:18,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:43:18,190 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:43:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:43:18,191 INFO L82 PathProgramCache]: Analyzing trace with hash -586459585, now seen corresponding path program 1 times [2020-08-21 16:43:18,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:43:18,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729468572] [2020-08-21 16:43:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:43:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:19,251 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 16:43:19,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:43:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:19,420 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 16:43:19,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729468572] [2020-08-21 16:43:19,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:43:19,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:43:19,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26089198] [2020-08-21 16:43:19,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:43:19,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:43:19,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:43:19,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:43:19,424 INFO L87 Difference]: Start difference. First operand 2423 states and 3727 transitions. Second operand 4 states. [2020-08-21 16:43:19,971 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-21 16:43:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:43:26,606 INFO L93 Difference]: Finished difference Result 5038 states and 7854 transitions. [2020-08-21 16:43:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:43:26,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-21 16:43:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:43:26,635 INFO L225 Difference]: With dead ends: 5038 [2020-08-21 16:43:26,635 INFO L226 Difference]: Without dead ends: 4361 [2020-08-21 16:43:26,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:43:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2020-08-21 16:43:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359. [2020-08-21 16:43:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4359 states. [2020-08-21 16:43:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions. [2020-08-21 16:43:26,770 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327 [2020-08-21 16:43:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:43:26,772 INFO L479 AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions. [2020-08-21 16:43:26,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:43:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions. [2020-08-21 16:43:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 16:43:26,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:43:26,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:26,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:43:26,787 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:43:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:43:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times [2020-08-21 16:43:26,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:43:26,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044559802] [2020-08-21 16:43:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:43:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:27,939 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 16:43:27,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:43:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:28,168 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 16:43:28,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044559802] [2020-08-21 16:43:28,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:43:28,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:43:28,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940021207] [2020-08-21 16:43:28,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:43:28,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:43:28,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:43:28,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:43:28,171 INFO L87 Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 5 states. [2020-08-21 16:43:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:43:38,915 INFO L93 Difference]: Finished difference Result 12898 states and 19904 transitions. [2020-08-21 16:43:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:43:38,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-08-21 16:43:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:43:38,956 INFO L225 Difference]: With dead ends: 12898 [2020-08-21 16:43:38,957 INFO L226 Difference]: Without dead ends: 8554 [2020-08-21 16:43:38,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:43:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8554 states. [2020-08-21 16:43:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8347. [2020-08-21 16:43:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8347 states. [2020-08-21 16:43:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 12864 transitions. [2020-08-21 16:43:39,278 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 12864 transitions. Word has length 327 [2020-08-21 16:43:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:43:39,278 INFO L479 AbstractCegarLoop]: Abstraction has 8347 states and 12864 transitions. [2020-08-21 16:43:39,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:43:39,278 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 12864 transitions. [2020-08-21 16:43:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-21 16:43:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:43:39,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:39,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:43:39,308 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:43:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:43:39,309 INFO L82 PathProgramCache]: Analyzing trace with hash 318218777, now seen corresponding path program 1 times [2020-08-21 16:43:39,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:43:39,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723402304] [2020-08-21 16:43:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:43:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:40,041 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 16:43:40,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:43:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:43:40,230 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 16:43:40,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723402304] [2020-08-21 16:43:40,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:43:40,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:43:40,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870288947] [2020-08-21 16:43:40,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:43:40,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:43:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:43:40,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:43:40,233 INFO L87 Difference]: Start difference. First operand 8347 states and 12864 transitions. Second operand 4 states.