/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:56:32,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:56:32,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:56:32,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:56:32,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:56:32,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:56:32,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:56:32,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:56:32,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:56:32,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:56:32,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:56:32,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:56:32,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:56:32,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:56:32,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:56:32,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:56:32,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:56:32,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:56:32,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:56:32,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:56:32,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:56:32,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:56:32,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:56:32,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:56:32,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:56:32,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:56:32,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:56:32,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:56:32,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:56:32,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 02:56:32,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 02:56:32,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 02:56:32,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 02:56:32,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 02:56:32,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 02:56:32,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 02:56:32,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 02:56:32,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 02:56:32,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:56:32,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:56:32,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:56:32,336 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 [2020-08-19 02:56:32,382 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:56:32,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:56:32,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:56:32,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:56:32,385 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:56:32,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:56:32,385 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:56:32,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:56:32,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:56:32,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:56:32,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:56:32,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:56:32,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:56:32,388 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:56:32,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:56:32,388 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:56:32,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:56:32,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:56:32,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:56:32,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:56:32,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:56:32,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:56:32,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:56:32,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:56:32,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:56:32,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:56:32,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:56:32,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:56:32,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:56:32,391 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:56:32,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:56:32,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:56:32,739 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:56:32,742 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:56:32,742 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:56:32,743 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 02:56:32,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92a05ebec/52ee0ddb0d4144118c606df45965546f/FLAGfb8691a5c [2020-08-19 02:56:33,481 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:56:33,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 02:56:33,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92a05ebec/52ee0ddb0d4144118c606df45965546f/FLAGfb8691a5c [2020-08-19 02:56:33,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92a05ebec/52ee0ddb0d4144118c606df45965546f [2020-08-19 02:56:33,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:56:33,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:56:33,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:56:33,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:56:33,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:56:33,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:56:33" (1/1) ... [2020-08-19 02:56:33,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510a549d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:33, skipping insertion in model container [2020-08-19 02:56:33,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:56:33" (1/1) ... [2020-08-19 02:56:33,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:56:33,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:56:34,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:56:34,892 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:56:35,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:56:35,413 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:56:35,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35 WrapperNode [2020-08-19 02:56:35,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:56:35,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:56:35,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:56:35,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:56:35,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (1/1) ... [2020-08-19 02:56:35,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (1/1) ... [2020-08-19 02:56:35,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (1/1) ... [2020-08-19 02:56:35,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (1/1) ... [2020-08-19 02:56:35,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (1/1) ... [2020-08-19 02:56:35,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (1/1) ... [2020-08-19 02:56:35,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (1/1) ... [2020-08-19 02:56:35,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:56:35,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:56:35,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:56:35,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:56:35,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (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 [2020-08-19 02:56:35,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:56:35,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:56:35,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 02:56:35,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:56:35,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:56:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 02:56:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-19 02:56:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-19 02:56:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-19 02:56:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 02:56:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 02:56:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-19 02:56:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-19 02:56:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-19 02:56:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-19 02:56:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-19 02:56:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-19 02:56:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 02:56:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 02:56:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:56:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:56:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:56:38,581 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:56:38,581 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:56:38,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:56:38 BoogieIcfgContainer [2020-08-19 02:56:38,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:56:38,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:56:38,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:56:38,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:56:38,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:56:33" (1/3) ... [2020-08-19 02:56:38,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232c96a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:56:38, skipping insertion in model container [2020-08-19 02:56:38,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:35" (2/3) ... [2020-08-19 02:56:38,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232c96a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:56:38, skipping insertion in model container [2020-08-19 02:56:38,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:56:38" (3/3) ... [2020-08-19 02:56:38,600 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 02:56:38,610 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:56:38,619 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:56:38,634 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:56:38,661 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:56:38,662 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:56:38,662 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:56:38,662 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:56:38,662 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:56:38,662 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:56:38,662 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:56:38,663 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:56:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-08-19 02:56:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-19 02:56:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:38,729 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] [2020-08-19 02:56:38,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-08-19 02:56:38,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:38,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137010505] [2020-08-19 02:56:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:40,740 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:56:40,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:41,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137010505] [2020-08-19 02:56:41,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:41,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:41,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870619802] [2020-08-19 02:56:41,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:41,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:41,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:41,144 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-08-19 02:56:41,882 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 02:56:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:47,320 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-08-19 02:56:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:56:47,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-19 02:56:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:47,356 INFO L225 Difference]: With dead ends: 1515 [2020-08-19 02:56:47,356 INFO L226 Difference]: Without dead ends: 1299 [2020-08-19 02:56:47,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:56:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-08-19 02:56:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-08-19 02:56:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-08-19 02:56:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-08-19 02:56:47,518 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-08-19 02:56:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:47,524 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-08-19 02:56:47,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:56:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-08-19 02:56:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-19 02:56:47,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:47,539 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] [2020-08-19 02:56:47,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:56:47,540 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-08-19 02:56:47,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:47,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847454228] [2020-08-19 02:56:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:48,762 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:56:48,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:49,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847454228] [2020-08-19 02:56:49,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:49,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:49,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778831194] [2020-08-19 02:56:49,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:49,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:49,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:49,038 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-08-19 02:56:49,912 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 02:56:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:54,579 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-08-19 02:56:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:56:54,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-19 02:56:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:54,592 INFO L225 Difference]: With dead ends: 2671 [2020-08-19 02:56:54,593 INFO L226 Difference]: Without dead ends: 2289 [2020-08-19 02:56:54,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:56:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-08-19 02:56:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-08-19 02:56:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-08-19 02:56:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-08-19 02:56:54,685 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-08-19 02:56:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:54,686 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-08-19 02:56:54,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:56:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-08-19 02:56:54,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-19 02:56:54,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:54,696 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] [2020-08-19 02:56:54,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:56:54,697 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:54,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-08-19 02:56:54,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:54,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281095207] [2020-08-19 02:56:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:55,632 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:56:55,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:55,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281095207] [2020-08-19 02:56:55,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:55,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:55,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565270131] [2020-08-19 02:56:55,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:55,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:55,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:55,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:55,900 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-08-19 02:56:56,437 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 02:57:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:01,440 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-08-19 02:57:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:57:01,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-19 02:57:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:01,463 INFO L225 Difference]: With dead ends: 4943 [2020-08-19 02:57:01,463 INFO L226 Difference]: Without dead ends: 4229 [2020-08-19 02:57:01,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:57:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-08-19 02:57:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-08-19 02:57:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-08-19 02:57:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-08-19 02:57:01,593 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-08-19 02:57:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:57:01,594 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-08-19 02:57:01,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:57:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-08-19 02:57:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-19 02:57:01,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:57:01,606 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] [2020-08-19 02:57:01,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:57:01,607 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:57:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:57:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-08-19 02:57:01,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:57:01,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653583481] [2020-08-19 02:57:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:57:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:02,517 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:57:02,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:57:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:57:02,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653583481] [2020-08-19 02:57:02,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:57:02,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:57:02,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141663498] [2020-08-19 02:57:02,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:57:02,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:57:02,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:57:02,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:57:02,685 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-08-19 02:57:03,221 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 02:57:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:07,423 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-08-19 02:57:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:57:07,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-19 02:57:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:07,459 INFO L225 Difference]: With dead ends: 9359 [2020-08-19 02:57:07,460 INFO L226 Difference]: Without dead ends: 8029 [2020-08-19 02:57:07,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:57:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-08-19 02:57:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-08-19 02:57:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-08-19 02:57:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-08-19 02:57:07,734 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-08-19 02:57:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:57:07,735 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-08-19 02:57:07,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:57:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-08-19 02:57:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-19 02:57:07,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:57:07,752 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] [2020-08-19 02:57:07,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:57:07,753 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:57:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:57:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-08-19 02:57:07,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:57:07,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779860778] [2020-08-19 02:57:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:57:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:08,787 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:57:08,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:57:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:57:08,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779860778] [2020-08-19 02:57:08,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:57:08,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:57:08,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418457335] [2020-08-19 02:57:08,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:57:08,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:57:08,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:57:08,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:57:08,956 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-08-19 02:57:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:16,964 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2020-08-19 02:57:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:57:16,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-08-19 02:57:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:17,026 INFO L225 Difference]: With dead ends: 23754 [2020-08-19 02:57:17,026 INFO L226 Difference]: Without dead ends: 15742 [2020-08-19 02:57:17,045 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 [2020-08-19 02:57:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-08-19 02:57:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-08-19 02:57:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-08-19 02:57:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2020-08-19 02:57:17,541 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2020-08-19 02:57:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:57:17,541 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2020-08-19 02:57:17,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:57:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2020-08-19 02:57:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-19 02:57:17,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:57:17,580 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] [2020-08-19 02:57:17,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:57:17,690 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:57:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:57:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-08-19 02:57:17,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:57:17,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325638267] [2020-08-19 02:57:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:57:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:18,375 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:57:18,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:57:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:57:18,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325638267] [2020-08-19 02:57:18,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:57:18,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:57:18,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893371398] [2020-08-19 02:57:18,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:57:18,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:57:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:57:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:57:18,534 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states. [2020-08-19 02:57:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:27,050 INFO L93 Difference]: Finished difference Result 46481 states and 71518 transitions. [2020-08-19 02:57:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:57:27,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-08-19 02:57:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:27,130 INFO L225 Difference]: With dead ends: 46481 [2020-08-19 02:57:27,130 INFO L226 Difference]: Without dead ends: 30870 [2020-08-19 02:57:27,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:57:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30870 states.