/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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:39:11,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:39:11,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:39:11,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:39:11,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:39:11,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:39:11,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:39:11,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:39:11,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:39:11,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:39:11,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:39:11,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:39:11,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:39:11,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:39:11,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:39:11,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:39:11,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:39:11,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:39:11,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:39:11,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:39:11,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:39:11,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:39:11,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:39:11,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:39:11,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:39:11,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:39:11,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:39:11,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:39:11,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:39:11,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:39:11,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:39:11,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:39:11,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:39:11,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:39:11,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:39:11,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:39:11,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:39:11,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:39:11,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:39:11,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:39:11,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:39:11,500 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 12:39:11,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:39:11,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:39:11,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:39:11,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:39:11,527 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:39:11,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:39:11,528 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:39:11,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:39:11,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:39:11,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:39:11,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:39:11,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:39:11,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:39:11,529 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:39:11,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:39:11,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:39:11,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:39:11,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:39:11,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:39:11,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:39:11,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:39:11,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:39:11,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:39:11,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:39:11,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:39:11,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:39:11,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:39:11,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:39:11,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:39:11,532 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 12:39:11,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:39:11,995 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:39:11,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:39:12,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:39:12,002 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:39:12,004 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:12,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3d674ecf/452f452e4c8348e4861b424bb00299dd/FLAG1e22eafd7 [2020-09-21 12:39:12,825 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:39:12,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:12,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3d674ecf/452f452e4c8348e4861b424bb00299dd/FLAG1e22eafd7 [2020-09-21 12:39:12,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3d674ecf/452f452e4c8348e4861b424bb00299dd [2020-09-21 12:39:12,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:39:12,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:39:12,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:12,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:39:12,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:39:12,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2876d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:12, skipping insertion in model container [2020-09-21 12:39:12,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:12" (1/1) ... [2020-09-21 12:39:12,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:39:13,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:39:13,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:14,009 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:39:14,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:14,528 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:39:14,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14 WrapperNode [2020-09-21 12:39:14,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:14,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:39:14,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:39:14,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:39:14,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (1/1) ... [2020-09-21 12:39:14,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (1/1) ... [2020-09-21 12:39:14,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (1/1) ... [2020-09-21 12:39:14,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (1/1) ... [2020-09-21 12:39:14,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (1/1) ... [2020-09-21 12:39:14,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (1/1) ... [2020-09-21 12:39:14,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (1/1) ... [2020-09-21 12:39:14,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:39:14,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:39:14,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:39:14,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:39:14,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (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 12:39:14,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:39:14,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:39:14,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:39:14,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:39:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:39:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:39:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:39:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:39:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:39:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:39:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:39:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:39:14,884 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:39:14,884 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:39:14,884 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:39:14,884 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:39:14,885 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:39:14,885 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:39:14,885 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:39:14,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:39:14,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:39:14,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:39:17,356 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:39:17,356 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:39:17,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:17 BoogieIcfgContainer [2020-09-21 12:39:17,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:39:17,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:39:17,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:39:17,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:39:17,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:39:12" (1/3) ... [2020-09-21 12:39:17,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40727208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:17, skipping insertion in model container [2020-09-21 12:39:17,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:14" (2/3) ... [2020-09-21 12:39:17,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40727208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:17, skipping insertion in model container [2020-09-21 12:39:17,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:17" (3/3) ... [2020-09-21 12:39:17,385 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:17,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:39:17,409 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:39:17,431 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:39:17,468 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:39:17,469 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:39:17,469 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:39:17,469 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:39:17,469 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:39:17,469 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:39:17,469 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:39:17,470 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:39:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-09-21 12:39:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 12:39:17,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:17,546 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] [2020-09-21 12:39:17,547 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-09-21 12:39:17,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:17,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67937426] [2020-09-21 12:39:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:18,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:19,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:19,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 12:39:19,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:19,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1460 [2020-09-21 12:39:19,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-09-21 12:39:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-21 12:39:19,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:39:20,761 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:20,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:20,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:20,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:20,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:20,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 12:39:20,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:20,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:21,132 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 12:39:21,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67937426] [2020-09-21 12:39:21,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:21,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:21,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19482361] [2020-09-21 12:39:21,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:21,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:21,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:21,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:21,165 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-09-21 12:39:21,645 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:26,595 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-09-21 12:39:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:26,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 12:39:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:26,631 INFO L225 Difference]: With dead ends: 1489 [2020-09-21 12:39:26,631 INFO L226 Difference]: Without dead ends: 1273 [2020-09-21 12:39:26,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-09-21 12:39:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-09-21 12:39:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-09-21 12:39:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-09-21 12:39:26,779 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-09-21 12:39:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:26,781 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-09-21 12:39:26,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-09-21 12:39:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 12:39:26,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:26,796 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] [2020-09-21 12:39:26,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:39:26,798 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:26,799 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-09-21 12:39:26,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:26,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900278132] [2020-09-21 12:39:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:27,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:27,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:28,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:28,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 12:39:28,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:28,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1338 [2020-09-21 12:39:28,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-21 12:39:28,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-09-21 12:39:28,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:29,038 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:29,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:29,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:29,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:29,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:29,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:29,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 12:39:29,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:29,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:29,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:29,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:29,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-21 12:39:29,274 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 12:39:29,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900278132] [2020-09-21 12:39:29,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:29,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:29,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783137640] [2020-09-21 12:39:29,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:29,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:29,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:29,280 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-09-21 12:39:29,892 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:34,460 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-09-21 12:39:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:34,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 12:39:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:34,476 INFO L225 Difference]: With dead ends: 2607 [2020-09-21 12:39:34,476 INFO L226 Difference]: Without dead ends: 2225 [2020-09-21 12:39:34,480 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 12:39:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-09-21 12:39:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-09-21 12:39:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-09-21 12:39:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-09-21 12:39:34,559 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-09-21 12:39:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:34,560 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-09-21 12:39:34,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-09-21 12:39:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 12:39:34,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:34,569 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] [2020-09-21 12:39:34,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:34,569 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:34,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-09-21 12:39:34,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:34,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556861602] [2020-09-21 12:39:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:35,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:35,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:35,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:35,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 12:39:35,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:35,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-09-21 12:39:35,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:35,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:35,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-09-21 12:39:35,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 237 [2020-09-21 12:39:35,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:36,532 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:36,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:36,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:36,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:36,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:36,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:36,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-21 12:39:36,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:36,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:36,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:36,771 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 12:39:36,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556861602] [2020-09-21 12:39:36,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:36,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:36,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907539668] [2020-09-21 12:39:36,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:36,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:36,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:36,777 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-09-21 12:39:37,329 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 12:39:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:41,354 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-09-21 12:39:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:41,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 12:39:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:41,374 INFO L225 Difference]: With dead ends: 4715 [2020-09-21 12:39:41,375 INFO L226 Difference]: Without dead ends: 4049 [2020-09-21 12:39:41,377 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 12:39:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-09-21 12:39:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-09-21 12:39:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-09-21 12:39:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-09-21 12:39:41,502 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-09-21 12:39:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:41,503 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-09-21 12:39:41,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-09-21 12:39:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 12:39:41,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:41,514 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] [2020-09-21 12:39:41,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:39:41,514 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:41,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-09-21 12:39:41,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:41,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511986164] [2020-09-21 12:39:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:43,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:43,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 12:39:43,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:43,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-09-21 12:39:43,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:43,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:43,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:43,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-21 12:39:43,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:43,777 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:43,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:43,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:43,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:43,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:43,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:43,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 12:39:43,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:43,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:43,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:43,987 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 12:39:43,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511986164] [2020-09-21 12:39:43,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:43,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:43,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570719222] [2020-09-21 12:39:43,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:43,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:43,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:43,990 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-09-21 12:39:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:50,586 INFO L93 Difference]: Finished difference Result 12001 states and 18571 transitions. [2020-09-21 12:39:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:50,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-09-21 12:39:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:50,627 INFO L225 Difference]: With dead ends: 12001 [2020-09-21 12:39:50,627 INFO L226 Difference]: Without dead ends: 7967 [2020-09-21 12:39:50,635 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 12:39:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2020-09-21 12:39:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 7965. [2020-09-21 12:39:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7965 states. [2020-09-21 12:39:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 12270 transitions. [2020-09-21 12:39:50,890 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 12270 transitions. Word has length 326 [2020-09-21 12:39:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:50,891 INFO L479 AbstractCegarLoop]: Abstraction has 7965 states and 12270 transitions. [2020-09-21 12:39:50,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 12270 transitions. [2020-09-21 12:39:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 12:39:50,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:50,904 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] [2020-09-21 12:39:50,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:39:50,905 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:50,906 INFO L82 PathProgramCache]: Analyzing trace with hash -806411643, now seen corresponding path program 1 times [2020-09-21 12:39:50,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:50,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375047908] [2020-09-21 12:39:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:51,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:51,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:51,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:52,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:52,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-09-21 12:39:52,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:39:52,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-21 12:39:52,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:39:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-09-21 12:39:52,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:52,643 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:39:52,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:52,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:52,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:52,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:52,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:52,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 12:39:52,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:52,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:52,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:52,965 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 12:39:52,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375047908] [2020-09-21 12:39:52,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:52,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:52,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131308778] [2020-09-21 12:39:52,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:52,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:52,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:52,974 INFO L87 Difference]: Start difference. First operand 7965 states and 12270 transitions. Second operand 4 states. [2020-09-21 12:40:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:40:01,015 INFO L93 Difference]: Finished difference Result 23423 states and 36009 transitions. [2020-09-21 12:40:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:40:01,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-09-21 12:40:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:40:01,074 INFO L225 Difference]: With dead ends: 23423 [2020-09-21 12:40:01,074 INFO L226 Difference]: Without dead ends: 15598 [2020-09-21 12:40:01,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:40:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15598 states. [2020-09-21 12:40:01,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15598 to 15596. [2020-09-21 12:40:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15596 states. [2020-09-21 12:40:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15596 states to 15596 states and 23874 transitions. [2020-09-21 12:40:01,612 INFO L78 Accepts]: Start accepts. Automaton has 15596 states and 23874 transitions. Word has length 328 [2020-09-21 12:40:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:40:01,613 INFO L479 AbstractCegarLoop]: Abstraction has 15596 states and 23874 transitions. [2020-09-21 12:40:01,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:40:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 15596 states and 23874 transitions. [2020-09-21 12:40:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 12:40:01,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:40:01,640 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] [2020-09-21 12:40:01,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:40:01,640 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:40:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:40:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1426419210, now seen corresponding path program 1 times [2020-09-21 12:40:01,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:40:01,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505973907] [2020-09-21 12:40:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:40:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:01,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:02,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:02,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:02,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:02,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:02,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-09-21 12:40:02,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:40:02,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-09-21 12:40:02,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:02,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:40:02,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:40:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:40:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:40:03,328 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 12:40:03,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:40:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:03,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:03,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:03,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:40:03,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:40:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-21 12:40:03,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:40:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:40:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:40:03,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:40:03,488 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 12:40:03,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505973907] [2020-09-21 12:40:03,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:40:03,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:40:03,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144152956] [2020-09-21 12:40:03,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:40:03,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:40:03,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:40:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:40:03,491 INFO L87 Difference]: Start difference. First operand 15596 states and 23874 transitions. Second operand 4 states.