/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:12:28,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:12:28,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:12:28,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:12:28,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:12:28,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:12:28,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:12:28,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:12:28,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:12:28,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:12:28,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:12:28,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:12:28,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:12:28,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:12:28,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:12:28,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:12:28,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:12:28,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:12:28,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:12:28,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:12:28,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:12:28,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:12:28,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:12:28,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:12:28,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:12:28,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:12:28,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:12:28,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:12:28,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:12:28,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:12:28,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:12:28,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:12:28,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:12:28,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:12:28,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:12:28,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:12:28,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:12:28,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:12:28,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:12:28,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:12:28,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:12:28,605 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 [2020-08-22 03:12:28,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:12:28,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:12:28,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:12:28,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:12:28,637 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:12:28,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:12:28,638 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:12:28,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:12:28,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:12:28,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:12:28,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:12:28,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:12:28,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:12:28,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:12:28,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:12:28,640 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:12:28,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:12:28,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:12:28,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:12:28,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:12:28,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:12:28,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:12:28,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:12:28,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:12:28,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:12:28,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:12:28,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:12:28,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:12:28,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:12:28,648 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 03:12:29,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:12:29,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:12:29,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:12:29,056 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:12:29,057 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:12:29,058 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:12:29,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/879c1a5f0/dcd7a41c76984dcb92efcb6d8e13664c/FLAGbd8f48a48 [2020-08-22 03:12:29,807 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:12:29,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:12:29,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/879c1a5f0/dcd7a41c76984dcb92efcb6d8e13664c/FLAGbd8f48a48 [2020-08-22 03:12:30,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/879c1a5f0/dcd7a41c76984dcb92efcb6d8e13664c [2020-08-22 03:12:30,095 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:12:30,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:12:30,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:12:30,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:12:30,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:12:30,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:12:30" (1/1) ... [2020-08-22 03:12:30,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2557634b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:30, skipping insertion in model container [2020-08-22 03:12:30,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:12:30" (1/1) ... [2020-08-22 03:12:30,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:12:30,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:12:31,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:12:31,809 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:12:33,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:12:33,172 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:12:33,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33 WrapperNode [2020-08-22 03:12:33,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:12:33,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:12:33,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:12:33,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:12:33,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (1/1) ... [2020-08-22 03:12:33,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (1/1) ... [2020-08-22 03:12:33,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (1/1) ... [2020-08-22 03:12:33,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (1/1) ... [2020-08-22 03:12:33,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (1/1) ... [2020-08-22 03:12:33,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (1/1) ... [2020-08-22 03:12:33,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (1/1) ... [2020-08-22 03:12:33,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:12:33,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:12:33,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:12:33,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:12:33,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (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 [2020-08-22 03:12:33,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:12:33,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:12:33,520 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 03:12:33,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:12:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:12:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 03:12:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 03:12:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 03:12:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 03:12:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 03:12:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 03:12:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 03:12:33,523 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 03:12:33,523 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 03:12:33,523 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 03:12:33,523 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 03:12:33,524 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 03:12:33,524 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 03:12:33,524 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 03:12:33,524 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 03:12:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:12:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:12:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:12:37,657 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:12:37,657 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:12:37,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:12:37 BoogieIcfgContainer [2020-08-22 03:12:37,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:12:37,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:12:37,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:12:37,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:12:37,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:12:30" (1/3) ... [2020-08-22 03:12:37,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5f6de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:12:37, skipping insertion in model container [2020-08-22 03:12:37,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:33" (2/3) ... [2020-08-22 03:12:37,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5f6de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:12:37, skipping insertion in model container [2020-08-22 03:12:37,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:12:37" (3/3) ... [2020-08-22 03:12:37,678 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:12:37,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:12:37,697 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:12:37,711 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:12:37,755 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:12:37,755 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:12:37,755 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:12:37,756 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:12:37,756 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:12:37,756 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:12:37,756 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:12:37,756 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:12:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-08-22 03:12:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 03:12:37,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:12:37,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:12:37,844 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:12:37,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:12:37,851 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-08-22 03:12:37,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:12:37,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498446787] [2020-08-22 03:12:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:12:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:12:40,992 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 03:12:40,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:12:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:12:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:12:41,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498446787] [2020-08-22 03:12:41,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:12:41,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:12:41,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339364684] [2020-08-22 03:12:41,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:12:41,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:12:41,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:12:41,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:12:41,424 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-08-22 03:12:42,331 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-08-22 03:12:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:12:52,698 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-08-22 03:12:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:12:52,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-08-22 03:12:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:12:52,759 INFO L225 Difference]: With dead ends: 2262 [2020-08-22 03:12:52,759 INFO L226 Difference]: Without dead ends: 1993 [2020-08-22 03:12:52,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:12:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-08-22 03:12:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-08-22 03:12:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-08-22 03:12:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-08-22 03:12:52,951 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-08-22 03:12:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:12:52,953 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-08-22 03:12:52,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:12:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-08-22 03:12:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 03:12:52,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:12:52,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:12:52,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:12:52,969 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:12:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:12:52,970 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-08-22 03:12:52,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:12:52,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120303012] [2020-08-22 03:12:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:12:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:12:55,581 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 03:12:55,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:12:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:12:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:12:56,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120303012] [2020-08-22 03:12:56,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:12:56,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:12:56,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772016017] [2020-08-22 03:12:56,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:12:56,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:12:56,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:12:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:12:56,175 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-08-22 03:13:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:11,209 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-08-22 03:13:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:11,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-08-22 03:13:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:11,233 INFO L225 Difference]: With dead ends: 5904 [2020-08-22 03:13:11,234 INFO L226 Difference]: Without dead ends: 3930 [2020-08-22 03:13:11,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:13:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-08-22 03:13:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-08-22 03:13:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-08-22 03:13:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-08-22 03:13:11,404 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-08-22 03:13:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:11,405 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-08-22 03:13:11,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:13:11,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-08-22 03:13:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-08-22 03:13:11,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:11,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:11,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:13:11,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-08-22 03:13:11,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:11,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444079591] [2020-08-22 03:13:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:12,866 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 03:13:12,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:13,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444079591] [2020-08-22 03:13:13,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:13,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:13,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193749665] [2020-08-22 03:13:13,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:13,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:13,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:13,181 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states.