/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_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:13:29,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:13:29,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:13:29,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:13:29,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:13:29,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:13:29,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:13:29,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:13:29,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:13:29,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:13:29,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:13:29,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:13:29,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:13:29,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:13:29,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:13:29,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:13:29,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:13:29,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:13:29,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:13:29,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:13:29,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:13:29,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:13:29,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:13:29,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:13:29,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:13:29,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:13:29,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:13:29,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:13:29,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:13:29,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:13:29,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:13:29,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:13:29,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:13:29,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:13:29,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:13:29,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:13:29,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:13:29,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:13:29,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:13:29,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:13:29,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:13:29,428 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 03:13:29,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:13:29,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:13:29,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:13:29,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:13:29,467 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:13:29,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:13:29,468 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:13:29,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:13:29,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:13:29,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:13:29,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:13:29,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:13:29,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:13:29,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:13:29,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:13:29,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:13:29,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:13:29,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:13:29,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:13:29,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:13:29,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:13:29,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:13:29,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:13:29,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:13:29,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:13:29,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:13:29,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:13:29,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:13:29,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:13:29,473 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 03:13:29,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:13:29,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:13:29,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:13:29,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:13:29,790 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:13:29,791 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:13:29,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3e168d79/991019bc3bc64d4c8fe3b7f671987c42/FLAG25d58bc3f [2020-08-22 03:13:30,578 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:13:30,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:13:30,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3e168d79/991019bc3bc64d4c8fe3b7f671987c42/FLAG25d58bc3f [2020-08-22 03:13:30,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3e168d79/991019bc3bc64d4c8fe3b7f671987c42 [2020-08-22 03:13:30,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:13:30,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:13:30,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:13:30,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:13:30,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:13:30,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:13:30" (1/1) ... [2020-08-22 03:13:30,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a428c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:30, skipping insertion in model container [2020-08-22 03:13:30,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:13:30" (1/1) ... [2020-08-22 03:13:30,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:13:30,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:13:32,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:13:32,615 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:13:33,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:13:33,794 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:13:33,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33 WrapperNode [2020-08-22 03:13:33,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:13:33,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:13:33,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:13:33,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:13:33,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (1/1) ... [2020-08-22 03:13:33,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (1/1) ... [2020-08-22 03:13:33,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (1/1) ... [2020-08-22 03:13:33,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (1/1) ... [2020-08-22 03:13:33,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (1/1) ... [2020-08-22 03:13:33,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (1/1) ... [2020-08-22 03:13:33,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (1/1) ... [2020-08-22 03:13:34,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:13:34,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:13:34,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:13:34,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:13:34,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (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 03:13:34,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:13:34,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:13:34,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 03:13:34,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:13:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:13:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 03:13:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 03:13:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 03:13:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 03:13:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 03:13:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 03:13:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 03:13:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 03:13:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 03:13:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 03:13:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 03:13:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 03:13:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 03:13:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 03:13:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 03:13:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:13:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:13:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:13:38,355 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:13:38,357 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:13:38,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:13:38 BoogieIcfgContainer [2020-08-22 03:13:38,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:13:38,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:13:38,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:13:38,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:13:38,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:13:30" (1/3) ... [2020-08-22 03:13:38,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455f9bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:13:38, skipping insertion in model container [2020-08-22 03:13:38,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:13:33" (2/3) ... [2020-08-22 03:13:38,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455f9bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:13:38, skipping insertion in model container [2020-08-22 03:13:38,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:13:38" (3/3) ... [2020-08-22 03:13:38,386 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:13:38,397 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:13:38,409 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:13:38,425 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:13:38,460 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:13:38,460 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:13:38,461 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:13:38,461 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:13:38,461 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:13:38,461 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:13:38,461 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:13:38,461 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:13:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-08-22 03:13:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-08-22 03:13:38,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:38,558 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:38,559 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-08-22 03:13:38,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:38,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210363865] [2020-08-22 03:13:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:41,355 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-08-22 03:13:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:41,671 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 03:13:41,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210363865] [2020-08-22 03:13:41,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:41,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:41,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643663582] [2020-08-22 03:13:41,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:41,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:41,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:41,695 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2020-08-22 03:13:42,506 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-08-22 03:13:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:53,016 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-08-22 03:13:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:53,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-08-22 03:13:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:53,060 INFO L225 Difference]: With dead ends: 2488 [2020-08-22 03:13:53,061 INFO L226 Difference]: Without dead ends: 2186 [2020-08-22 03:13:53,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-08-22 03:13:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-08-22 03:13:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-08-22 03:13:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-08-22 03:13:53,260 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-08-22 03:13:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:53,262 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-08-22 03:13:53,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-08-22 03:13:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-08-22 03:13:53,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:53,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:53,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:13:53,280 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-08-22 03:13:53,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:53,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843450036] [2020-08-22 03:13:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:55,996 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-08-22 03:13:55,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:56,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843450036] [2020-08-22 03:13:56,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:56,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:13:56,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17865984] [2020-08-22 03:13:56,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:13:56,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:56,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:13:56,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:56,742 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2020-08-22 03:14:11,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:14:11,958 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2020-08-22 03:14:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:14:11,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-08-22 03:14:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:14:11,983 INFO L225 Difference]: With dead ends: 6476 [2020-08-22 03:14:11,983 INFO L226 Difference]: Without dead ends: 4309 [2020-08-22 03:14:11,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:14:11,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2020-08-22 03:14:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2020-08-22 03:14:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2020-08-22 03:14:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2020-08-22 03:14:12,182 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2020-08-22 03:14:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:14:12,183 INFO L479 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2020-08-22 03:14:12,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:14:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2020-08-22 03:14:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-08-22 03:14:12,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:14:12,207 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:14:12,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:14:12,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:14:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:14:12,210 INFO L82 PathProgramCache]: Analyzing trace with hash 589891249, now seen corresponding path program 1 times [2020-08-22 03:14:12,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:14:12,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469669773] [2020-08-22 03:14:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:14:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:14:13,448 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-08-22 03:14:13,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:14:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:14:13,788 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 03:14:13,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469669773] [2020-08-22 03:14:13,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:14:13,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:14:13,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105728388] [2020-08-22 03:14:13,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:14:13,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:14:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:14:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:14:13,792 INFO L87 Difference]: Start difference. First operand 4307 states and 7000 transitions. Second operand 4 states.