/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:39:08,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:39:08,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:39:08,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:39:08,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:39:08,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:39:08,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:39:08,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:39:08,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:39:08,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:39:08,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:39:08,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:39:08,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:39:08,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:39:08,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:39:08,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:39:08,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:39:08,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:39:08,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:39:08,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:39:08,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:39:08,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:39:08,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:39:08,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:39:08,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:39:08,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:39:08,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:39:08,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:39:08,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:39:08,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:39:08,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:39:08,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:39:08,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:39:08,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:39:08,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:39:08,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:39:08,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:39:08,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:39:08,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:39:08,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:39:08,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:39:08,812 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 [2020-09-21 12:39:08,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:39:08,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:39:08,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:39:08,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:39:08,838 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:39:08,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:39:08,839 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:39:08,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:39:08,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:39:08,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:39:08,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:39:08,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:39:08,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:39:08,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:39:08,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:39:08,840 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:39:08,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:39:08,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:39:08,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:39:08,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:39:08,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:39:08,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:39:08,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:39:08,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:39:08,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:39:08,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:39:08,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:39:08,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:39:08,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:39:08,843 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:39:09,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:39:09,321 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:39:09,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:39:09,329 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:39:09,331 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:39:09,332 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:09,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34e8c8a43/45d73d63750241e095f0cc8ed98b7902/FLAG268566edd [2020-09-21 12:39:10,162 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:39:10,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:10,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34e8c8a43/45d73d63750241e095f0cc8ed98b7902/FLAG268566edd [2020-09-21 12:39:10,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34e8c8a43/45d73d63750241e095f0cc8ed98b7902 [2020-09-21 12:39:10,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:39:10,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:39:10,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:10,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:39:10,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:39:10,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:10" (1/1) ... [2020-09-21 12:39:10,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41357e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:10, skipping insertion in model container [2020-09-21 12:39:10,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:10" (1/1) ... [2020-09-21 12:39:10,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:39:10,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:39:11,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:11,601 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:39:12,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:12,146 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:39:12,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12 WrapperNode [2020-09-21 12:39:12,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:12,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:39:12,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:39:12,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:39:12,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:39:12,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:39:12,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:39:12,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:39:12,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (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 [2020-09-21 12:39:12,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:39:12,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:39:12,483 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:39:12,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:39:12,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:39:12,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:39:12,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:39:12,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:39:12,487 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:39:12,487 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:39:12,487 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:39:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:39:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:39:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:39:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:39:12,490 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:39:12,490 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:39:12,490 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:39:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:39:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:39:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:39:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:39:15,192 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:39:15,192 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:39:15,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:15 BoogieIcfgContainer [2020-09-21 12:39:15,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:39:15,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:39:15,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:39:15,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:39:15,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:39:10" (1/3) ... [2020-09-21 12:39:15,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269ffd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:15, skipping insertion in model container [2020-09-21 12:39:15,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12" (2/3) ... [2020-09-21 12:39:15,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269ffd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:15, skipping insertion in model container [2020-09-21 12:39:15,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:15" (3/3) ... [2020-09-21 12:39:15,217 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:15,229 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:39:15,240 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:39:15,263 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:39:15,302 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:39:15,302 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:39:15,303 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:39:15,303 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:39:15,303 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:39:15,303 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:39:15,303 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:39:15,303 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:39:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-09-21 12:39:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-21 12:39:15,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:15,378 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] [2020-09-21 12:39:15,379 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-09-21 12:39:15,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:15,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040897434] [2020-09-21 12:39:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:16,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:17,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:17,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:17,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-09-21 12:39:17,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:17,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-09-21 12:39:17,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-09-21 12:39:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-09-21 12:39:17,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:39:19,090 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:19,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:19,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:19,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:19,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:19,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:19,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-21 12:39:19,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:19,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:19,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:19,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040897434] [2020-09-21 12:39:19,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:19,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:19,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306244283] [2020-09-21 12:39:19,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:19,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:19,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:19,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:19,396 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-09-21 12:39:19,953 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:25,534 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-09-21 12:39:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:25,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-21 12:39:25,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:25,573 INFO L225 Difference]: With dead ends: 1527 [2020-09-21 12:39:25,573 INFO L226 Difference]: Without dead ends: 1311 [2020-09-21 12:39:25,580 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 [2020-09-21 12:39:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-09-21 12:39:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-09-21 12:39:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-09-21 12:39:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-09-21 12:39:25,743 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-09-21 12:39:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:25,745 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-09-21 12:39:25,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-09-21 12:39:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-21 12:39:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:25,755 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] [2020-09-21 12:39:25,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:39:25,756 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:25,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-09-21 12:39:25,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:25,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880623357] [2020-09-21 12:39:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:26,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:27,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:27,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-09-21 12:39:27,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:27,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1091 [2020-09-21 12:39:27,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:27,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:27,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-21 12:39:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-09-21 12:39:27,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:27,910 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:27,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:27,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:27,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:27,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:27,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 12:39:27,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:27,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:27,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:28,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880623357] [2020-09-21 12:39:28,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:28,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:28,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356113552] [2020-09-21 12:39:28,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:28,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:28,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:28,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:28,245 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-09-21 12:39:28,906 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:33,905 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-09-21 12:39:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:33,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-21 12:39:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:33,921 INFO L225 Difference]: With dead ends: 2683 [2020-09-21 12:39:33,922 INFO L226 Difference]: Without dead ends: 2301 [2020-09-21 12:39:33,930 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 [2020-09-21 12:39:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-09-21 12:39:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-09-21 12:39:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-09-21 12:39:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-09-21 12:39:34,033 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-09-21 12:39:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:34,036 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-09-21 12:39:34,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-09-21 12:39:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-21 12:39:34,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:34,046 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] [2020-09-21 12:39:34,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:34,047 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-09-21 12:39:34,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:34,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615557827] [2020-09-21 12:39:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:34,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:34,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:35,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:35,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-09-21 12:39:35,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:35,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-21 12:39:35,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-09-21 12:39:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-09-21 12:39:35,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:35,985 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:35,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:36,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:36,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:36,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:36,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:36,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 12:39:36,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:36,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:36,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:36,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:36,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:36,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615557827] [2020-09-21 12:39:36,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:36,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:36,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836520131] [2020-09-21 12:39:36,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:36,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:36,218 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-09-21 12:39:36,751 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:41,632 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-09-21 12:39:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:41,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-21 12:39:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:41,655 INFO L225 Difference]: With dead ends: 4867 [2020-09-21 12:39:41,655 INFO L226 Difference]: Without dead ends: 4201 [2020-09-21 12:39:41,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-09-21 12:39:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-09-21 12:39:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-09-21 12:39:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-09-21 12:39:41,786 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-09-21 12:39:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:41,787 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-09-21 12:39:41,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-09-21 12:39:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-21 12:39:41,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:41,800 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] [2020-09-21 12:39:41,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:39:41,800 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-09-21 12:39:41,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:41,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234317104] [2020-09-21 12:39:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:42,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:43,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:43,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:43,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-09-21 12:39:43,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:43,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1412 [2020-09-21 12:39:43,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:43,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-21 12:39:43,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:44,247 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:44,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:44,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:44,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:44,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:44,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:44,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 12:39:44,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:44,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:44,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:44,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:44,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:44,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234317104] [2020-09-21 12:39:44,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:44,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:44,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832942989] [2020-09-21 12:39:44,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:44,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:44,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:44,534 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-09-21 12:39:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:52,489 INFO L93 Difference]: Finished difference Result 12417 states and 19251 transitions. [2020-09-21 12:39:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:52,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-09-21 12:39:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:52,526 INFO L225 Difference]: With dead ends: 12417 [2020-09-21 12:39:52,526 INFO L226 Difference]: Without dead ends: 8231 [2020-09-21 12:39:52,535 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 [2020-09-21 12:39:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8231 states. [2020-09-21 12:39:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8231 to 8229. [2020-09-21 12:39:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2020-09-21 12:39:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 12694 transitions. [2020-09-21 12:39:52,827 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 12694 transitions. Word has length 330 [2020-09-21 12:39:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:52,828 INFO L479 AbstractCegarLoop]: Abstraction has 8229 states and 12694 transitions. [2020-09-21 12:39:52,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 12694 transitions. [2020-09-21 12:39:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-09-21 12:39:52,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:52,847 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] [2020-09-21 12:39:52,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:39:52,848 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:52,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1672602794, now seen corresponding path program 1 times [2020-09-21 12:39:52,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:52,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675456718] [2020-09-21 12:39:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:53,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:53,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:54,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:54,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-09-21 12:39:54,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:39:54,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-09-21 12:39:54,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:39:54,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-09-21 12:39:54,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:54,698 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:54,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:54,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:54,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:54,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:54,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 12:39:54,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:54,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:54,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:54,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:54,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:54,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675456718] [2020-09-21 12:39:54,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:54,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:54,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398001792] [2020-09-21 12:39:54,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:54,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:54,999 INFO L87 Difference]: Start difference. First operand 8229 states and 12694 transitions. Second operand 4 states.