/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_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:38:17,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:38:17,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:38:17,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:38:17,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:38:18,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:38:18,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:38:18,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:38:18,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:38:18,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:38:18,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:38:18,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:38:18,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:38:18,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:38:18,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:38:18,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:38:18,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:38:18,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:38:18,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:38:18,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:38:18,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:38:18,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:38:18,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:38:18,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:38:18,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:38:18,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:38:18,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:38:18,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:38:18,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:38:18,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:38:18,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:38:18,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:38:18,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:38:18,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:38:18,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:38:18,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:38:18,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:38:18,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:38:18,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:38:18,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:38:18,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:38:18,062 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 12:38:18,111 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:38:18,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:38:18,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:38:18,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:38:18,114 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:38:18,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:38:18,114 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:38:18,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:38:18,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:38:18,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:38:18,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:38:18,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:38:18,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:38:18,117 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:38:18,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:38:18,117 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:38:18,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:38:18,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:38:18,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:38:18,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:38:18,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:38:18,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:38:18,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:38:18,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:38:18,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:38:18,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:38:18,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:38:18,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:38:18,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:38:18,120 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 12:38:18,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:38:18,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:38:18,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:38:18,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:38:18,560 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:38:18,562 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:18,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/095134719/22360a65dc9546da869a638d9b065d43/FLAGed59d6699 [2020-09-21 12:38:19,251 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:38:19,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:19,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/095134719/22360a65dc9546da869a638d9b065d43/FLAGed59d6699 [2020-09-21 12:38:19,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/095134719/22360a65dc9546da869a638d9b065d43 [2020-09-21 12:38:19,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:38:19,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:38:19,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:38:19,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:38:19,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:38:19,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:19" (1/1) ... [2020-09-21 12:38:19,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e33c961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:19, skipping insertion in model container [2020-09-21 12:38:19,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:19" (1/1) ... [2020-09-21 12:38:19,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:38:19,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:38:20,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:38:20,156 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:38:20,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:38:20,329 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:38:20,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20 WrapperNode [2020-09-21 12:38:20,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:38:20,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:38:20,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:38:20,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:38:20,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (1/1) ... [2020-09-21 12:38:20,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (1/1) ... [2020-09-21 12:38:20,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (1/1) ... [2020-09-21 12:38:20,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (1/1) ... [2020-09-21 12:38:20,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (1/1) ... [2020-09-21 12:38:20,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (1/1) ... [2020-09-21 12:38:20,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (1/1) ... [2020-09-21 12:38:20,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:38:20,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:38:20,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:38:20,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:38:20,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (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 12:38:20,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:38:20,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:38:20,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:38:20,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:38:20,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:38:20,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:38:20,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:38:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:38:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:38:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:38:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:38:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:38:20,529 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:38:20,529 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:38:20,529 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:38:20,529 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:38:20,529 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:38:20,530 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:38:20,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:38:20,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:38:20,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:38:21,928 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:38:21,929 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:38:21,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:38:21 BoogieIcfgContainer [2020-09-21 12:38:21,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:38:21,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:38:21,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:38:21,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:38:21,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:38:19" (1/3) ... [2020-09-21 12:38:21,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156aca99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:38:21, skipping insertion in model container [2020-09-21 12:38:21,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:20" (2/3) ... [2020-09-21 12:38:21,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156aca99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:38:21, skipping insertion in model container [2020-09-21 12:38:21,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:38:21" (3/3) ... [2020-09-21 12:38:21,955 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:21,966 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:38:21,984 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:38:22,007 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:38:22,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:38:22,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:38:22,043 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:38:22,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:38:22,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:38:22,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:38:22,043 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:38:22,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:38:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2020-09-21 12:38:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-21 12:38:22,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:22,092 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] [2020-09-21 12:38:22,092 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1095322417, now seen corresponding path program 1 times [2020-09-21 12:38:22,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:22,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231996373] [2020-09-21 12:38:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:22,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:23,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:23,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:23,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:23,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:23,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-21 12:38:23,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:38:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-09-21 12:38:23,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 12:38:23,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-21 12:38:23,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:38:24,085 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:24,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:24,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:24,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:24,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:24,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:24,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 12:38:24,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:24,195 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 12:38:24,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231996373] [2020-09-21 12:38:24,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:24,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:38:24,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052580955] [2020-09-21 12:38:24,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:38:24,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:24,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:38:24,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:24,227 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2020-09-21 12:38:24,473 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-09-21 12:38:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:26,197 INFO L93 Difference]: Finished difference Result 635 states and 1108 transitions. [2020-09-21 12:38:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:38:26,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-09-21 12:38:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:26,237 INFO L225 Difference]: With dead ends: 635 [2020-09-21 12:38:26,237 INFO L226 Difference]: Without dead ends: 508 [2020-09-21 12:38:26,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:38:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-09-21 12:38:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 506. [2020-09-21 12:38:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-09-21 12:38:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 755 transitions. [2020-09-21 12:38:26,391 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 755 transitions. Word has length 144 [2020-09-21 12:38:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:26,395 INFO L479 AbstractCegarLoop]: Abstraction has 506 states and 755 transitions. [2020-09-21 12:38:26,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:38:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 755 transitions. [2020-09-21 12:38:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-21 12:38:26,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:26,405 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] [2020-09-21 12:38:26,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:38:26,405 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2000756509, now seen corresponding path program 1 times [2020-09-21 12:38:26,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:26,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301003399] [2020-09-21 12:38:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:26,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:26,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:27,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:27,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:27,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:27,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:27,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-21 12:38:27,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:38:27,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-09-21 12:38:27,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:27,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:38:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:38:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 12:38:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:27,959 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:27,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:27,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:27,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:27,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:27,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:27,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 12:38:28,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:28,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:28,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:28,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:38:28,052 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 12:38:28,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301003399] [2020-09-21 12:38:28,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:28,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:38:28,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791169069] [2020-09-21 12:38:28,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:38:28,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:28,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:38:28,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:38:28,058 INFO L87 Difference]: Start difference. First operand 506 states and 755 transitions. Second operand 5 states. [2020-09-21 12:38:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:30,857 INFO L93 Difference]: Finished difference Result 1453 states and 2162 transitions. [2020-09-21 12:38:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:38:30,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-09-21 12:38:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:30,865 INFO L225 Difference]: With dead ends: 1453 [2020-09-21 12:38:30,865 INFO L226 Difference]: Without dead ends: 976 [2020-09-21 12:38:30,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:38:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-09-21 12:38:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2020-09-21 12:38:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 974 states. [2020-09-21 12:38:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1441 transitions. [2020-09-21 12:38:30,933 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1441 transitions. Word has length 144 [2020-09-21 12:38:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:30,933 INFO L479 AbstractCegarLoop]: Abstraction has 974 states and 1441 transitions. [2020-09-21 12:38:30,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:38:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1441 transitions. [2020-09-21 12:38:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-21 12:38:30,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:30,938 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] [2020-09-21 12:38:30,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:38:30,938 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:30,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1147444865, now seen corresponding path program 1 times [2020-09-21 12:38:30,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:30,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689667653] [2020-09-21 12:38:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:31,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:31,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:31,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:32,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:32,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-09-21 12:38:32,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:38:32,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-09-21 12:38:32,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:32,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:32,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:38:32,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:38:32,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:38:32,337 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:32,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:32,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:32,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:32,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:32,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:32,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 12:38:32,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:32,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:32,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:32,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:32,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:32,406 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 12:38:32,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689667653] [2020-09-21 12:38:32,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:32,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:38:32,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224204048] [2020-09-21 12:38:32,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:38:32,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:38:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:32,415 INFO L87 Difference]: Start difference. First operand 974 states and 1441 transitions. Second operand 4 states. [2020-09-21 12:38:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:34,925 INFO L93 Difference]: Finished difference Result 2876 states and 4251 transitions. [2020-09-21 12:38:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:38:34,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-09-21 12:38:34,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:34,936 INFO L225 Difference]: With dead ends: 2876 [2020-09-21 12:38:34,936 INFO L226 Difference]: Without dead ends: 1934 [2020-09-21 12:38:34,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-09-21 12:38:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 976. [2020-09-21 12:38:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-09-21 12:38:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1443 transitions. [2020-09-21 12:38:35,023 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1443 transitions. Word has length 145 [2020-09-21 12:38:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:35,024 INFO L479 AbstractCegarLoop]: Abstraction has 976 states and 1443 transitions. [2020-09-21 12:38:35,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:38:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1443 transitions. [2020-09-21 12:38:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-21 12:38:35,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:35,027 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] [2020-09-21 12:38:35,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:38:35,029 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:35,029 INFO L82 PathProgramCache]: Analyzing trace with hash 772973737, now seen corresponding path program 1 times [2020-09-21 12:38:35,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:35,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643408060] [2020-09-21 12:38:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:35,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:35,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:35,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:35,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:36,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:36,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:36,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-09-21 12:38:36,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-21 12:38:36,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1078 [2020-09-21 12:38:36,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:36,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:36,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:38:36,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 12:38:36,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:36,429 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:36,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:36,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:36,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:36,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:36,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 12:38:36,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:38:36,543 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 12:38:36,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643408060] [2020-09-21 12:38:36,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:36,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:38:36,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436513717] [2020-09-21 12:38:36,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:38:36,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:38:36,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:36,548 INFO L87 Difference]: Start difference. First operand 976 states and 1443 transitions. Second operand 4 states. [2020-09-21 12:38:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:39,036 INFO L93 Difference]: Finished difference Result 2694 states and 3994 transitions. [2020-09-21 12:38:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:38:39,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-09-21 12:38:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:39,048 INFO L225 Difference]: With dead ends: 2694 [2020-09-21 12:38:39,049 INFO L226 Difference]: Without dead ends: 1886 [2020-09-21 12:38:39,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2020-09-21 12:38:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1884. [2020-09-21 12:38:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-09-21 12:38:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2760 transitions. [2020-09-21 12:38:39,160 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2760 transitions. Word has length 146 [2020-09-21 12:38:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:39,160 INFO L479 AbstractCegarLoop]: Abstraction has 1884 states and 2760 transitions. [2020-09-21 12:38:39,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:38:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2760 transitions. [2020-09-21 12:38:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-21 12:38:39,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:39,165 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] [2020-09-21 12:38:39,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:38:39,166 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:39,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash -283367418, now seen corresponding path program 1 times [2020-09-21 12:38:39,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:39,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295711321] [2020-09-21 12:38:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:39,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:39,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:39,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:39,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:39,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:40,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:40,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:40,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:40,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-09-21 12:38:40,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-21 12:38:40,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-09-21 12:38:40,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:40,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:38:40,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:38:40,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-21 12:38:40,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:38:40,724 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:40,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:40,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:40,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:40,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:40,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:40,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 12:38:40,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:38:40,809 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 12:38:40,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295711321] [2020-09-21 12:38:40,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:40,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:38:40,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305507359] [2020-09-21 12:38:40,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:38:40,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:38:40,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:38:40,812 INFO L87 Difference]: Start difference. First operand 1884 states and 2760 transitions. Second operand 5 states. [2020-09-21 12:38:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:43,079 INFO L93 Difference]: Finished difference Result 5466 states and 7978 transitions. [2020-09-21 12:38:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:38:43,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-09-21 12:38:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:43,102 INFO L225 Difference]: With dead ends: 5466 [2020-09-21 12:38:43,102 INFO L226 Difference]: Without dead ends: 3624 [2020-09-21 12:38:43,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:38:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2020-09-21 12:38:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 3622. [2020-09-21 12:38:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3622 states. [2020-09-21 12:38:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 5234 transitions. [2020-09-21 12:38:43,296 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 5234 transitions. Word has length 146 [2020-09-21 12:38:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:43,298 INFO L479 AbstractCegarLoop]: Abstraction has 3622 states and 5234 transitions. [2020-09-21 12:38:43,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:38:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 5234 transitions. [2020-09-21 12:38:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-21 12:38:43,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:43,305 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] [2020-09-21 12:38:43,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:38:43,305 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1986004033, now seen corresponding path program 1 times [2020-09-21 12:38:43,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:43,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297488500] [2020-09-21 12:38:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:43,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:43,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:43,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:43,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:43,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:44,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:44,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:44,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:44,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:44,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-09-21 12:38:44,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-21 12:38:44,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-09-21 12:38:44,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:38:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:38:44,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:38:44,661 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:44,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:44,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:44,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:44,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:44,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:44,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 12:38:44,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:44,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:38:44,733 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 12:38:44,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297488500] [2020-09-21 12:38:44,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:44,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:38:44,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983831947] [2020-09-21 12:38:44,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:38:44,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:44,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:38:44,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:44,738 INFO L87 Difference]: Start difference. First operand 3622 states and 5234 transitions. Second operand 4 states. [2020-09-21 12:38:46,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:46,330 INFO L93 Difference]: Finished difference Result 10546 states and 15264 transitions. [2020-09-21 12:38:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:38:46,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-09-21 12:38:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:46,359 INFO L225 Difference]: With dead ends: 10546 [2020-09-21 12:38:46,359 INFO L226 Difference]: Without dead ends: 7192 [2020-09-21 12:38:46,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7192 states. [2020-09-21 12:38:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7192 to 3634. [2020-09-21 12:38:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3634 states. [2020-09-21 12:38:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5250 transitions. [2020-09-21 12:38:46,640 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5250 transitions. Word has length 147 [2020-09-21 12:38:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:46,641 INFO L479 AbstractCegarLoop]: Abstraction has 3634 states and 5250 transitions. [2020-09-21 12:38:46,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:38:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5250 transitions. [2020-09-21 12:38:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-21 12:38:46,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:46,649 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] [2020-09-21 12:38:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:38:46,649 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1714613982, now seen corresponding path program 1 times [2020-09-21 12:38:46,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:46,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840256950] [2020-09-21 12:38:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:46,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:47,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:47,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:47,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:47,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:47,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:47,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:47,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:47,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:47,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-21 12:38:47,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-21 12:38:47,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-09-21 12:38:47,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:47,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:47,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:38:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-21 12:38:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:48,026 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:48,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:48,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:48,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:48,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:48,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:48,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 12:38:48,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:48,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:48,094 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 12:38:48,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840256950] [2020-09-21 12:38:48,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:48,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:38:48,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974682843] [2020-09-21 12:38:48,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:38:48,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:38:48,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:48,097 INFO L87 Difference]: Start difference. First operand 3634 states and 5250 transitions. Second operand 4 states. [2020-09-21 12:38:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:50,642 INFO L93 Difference]: Finished difference Result 10022 states and 14536 transitions. [2020-09-21 12:38:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:38:50,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-09-21 12:38:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:50,671 INFO L225 Difference]: With dead ends: 10022 [2020-09-21 12:38:50,671 INFO L226 Difference]: Without dead ends: 6832 [2020-09-21 12:38:50,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2020-09-21 12:38:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6830. [2020-09-21 12:38:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6830 states. [2020-09-21 12:38:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6830 states to 6830 states and 9778 transitions. [2020-09-21 12:38:51,062 INFO L78 Accepts]: Start accepts. Automaton has 6830 states and 9778 transitions. Word has length 148 [2020-09-21 12:38:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:51,063 INFO L479 AbstractCegarLoop]: Abstraction has 6830 states and 9778 transitions. [2020-09-21 12:38:51,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:38:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6830 states and 9778 transitions. [2020-09-21 12:38:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-21 12:38:51,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:51,075 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] [2020-09-21 12:38:51,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:38:51,076 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1281384897, now seen corresponding path program 1 times [2020-09-21 12:38:51,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:51,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30416469] [2020-09-21 12:38:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:51,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:51,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:51,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:51,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:51,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:51,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:52,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:52,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:52,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:52,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-21 12:38:52,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-21 12:38:52,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-09-21 12:38:52,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:52,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:38:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:38:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-21 12:38:52,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:52,474 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:52,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:52,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:52,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:52,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:52,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:52,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 12:38:52,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:52,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:52,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:52,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:52,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:52,555 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 12:38:52,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30416469] [2020-09-21 12:38:52,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:52,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:38:52,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583983163] [2020-09-21 12:38:52,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:38:52,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:38:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:38:52,557 INFO L87 Difference]: Start difference. First operand 6830 states and 9778 transitions. Second operand 5 states. [2020-09-21 12:38:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:55,111 INFO L93 Difference]: Finished difference Result 13872 states and 19770 transitions. [2020-09-21 12:38:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:38:55,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-09-21 12:38:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:55,138 INFO L225 Difference]: With dead ends: 13872 [2020-09-21 12:38:55,138 INFO L226 Difference]: Without dead ends: 7182 [2020-09-21 12:38:55,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:38:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2020-09-21 12:38:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 6812. [2020-09-21 12:38:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6812 states. [2020-09-21 12:38:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6812 states to 6812 states and 9733 transitions. [2020-09-21 12:38:55,455 INFO L78 Accepts]: Start accepts. Automaton has 6812 states and 9733 transitions. Word has length 148 [2020-09-21 12:38:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:55,455 INFO L479 AbstractCegarLoop]: Abstraction has 6812 states and 9733 transitions. [2020-09-21 12:38:55,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:38:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6812 states and 9733 transitions. [2020-09-21 12:38:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-21 12:38:55,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:55,469 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] [2020-09-21 12:38:55,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:38:55,469 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash -421201944, now seen corresponding path program 1 times [2020-09-21 12:38:55,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:55,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880682680] [2020-09-21 12:38:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:55,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:55,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:55,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:56,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:56,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:56,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:56,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:56,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:56,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-09-21 12:38:56,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-21 12:38:56,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:38:56,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 12:38:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:38:56,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:56,736 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:38:56,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:56,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:56,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:56,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:56,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-21 12:38:56,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:56,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:56,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:38:56,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880682680] [2020-09-21 12:38:56,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:56,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:38:56,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020817638] [2020-09-21 12:38:56,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:38:56,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:38:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:56,901 INFO L87 Difference]: Start difference. First operand 6812 states and 9733 transitions. Second operand 4 states. [2020-09-21 12:38:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:59,506 INFO L93 Difference]: Finished difference Result 19800 states and 28334 transitions. [2020-09-21 12:38:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:38:59,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-09-21 12:38:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:59,531 INFO L225 Difference]: With dead ends: 19800 [2020-09-21 12:38:59,532 INFO L226 Difference]: Without dead ends: 13496 [2020-09-21 12:38:59,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13496 states. [2020-09-21 12:38:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13496 to 6830. [2020-09-21 12:38:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6830 states. [2020-09-21 12:38:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6830 states to 6830 states and 9757 transitions. [2020-09-21 12:38:59,884 INFO L78 Accepts]: Start accepts. Automaton has 6830 states and 9757 transitions. Word has length 149 [2020-09-21 12:38:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:59,884 INFO L479 AbstractCegarLoop]: Abstraction has 6830 states and 9757 transitions. [2020-09-21 12:38:59,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:38:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6830 states and 9757 transitions. [2020-09-21 12:38:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-21 12:38:59,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:59,893 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] [2020-09-21 12:38:59,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:38:59,893 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1003679488, now seen corresponding path program 1 times [2020-09-21 12:38:59,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:59,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54682960] [2020-09-21 12:38:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:00,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:00,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:00,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:00,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:00,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-09-21 12:39:00,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:39:00,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-09-21 12:39:00,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:00,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:39:00,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:01,365 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:39:01,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:01,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:01,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:01,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:01,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:01,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 12:39:01,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:01,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:01,428 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 12:39:01,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54682960] [2020-09-21 12:39:01,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:01,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:01,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45251214] [2020-09-21 12:39:01,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:01,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:01,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:01,431 INFO L87 Difference]: Start difference. First operand 6830 states and 9757 transitions. Second operand 5 states. [2020-09-21 12:39:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:04,372 INFO L93 Difference]: Finished difference Result 13549 states and 19358 transitions. [2020-09-21 12:39:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:04,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-09-21 12:39:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:04,388 INFO L225 Difference]: With dead ends: 13549 [2020-09-21 12:39:04,388 INFO L226 Difference]: Without dead ends: 7147 [2020-09-21 12:39:04,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:39:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7147 states. [2020-09-21 12:39:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7147 to 6997. [2020-09-21 12:39:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6997 states. [2020-09-21 12:39:04,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6997 states to 6997 states and 9954 transitions. [2020-09-21 12:39:04,959 INFO L78 Accepts]: Start accepts. Automaton has 6997 states and 9954 transitions. Word has length 150 [2020-09-21 12:39:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:04,959 INFO L479 AbstractCegarLoop]: Abstraction has 6997 states and 9954 transitions. [2020-09-21 12:39:04,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:04,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6997 states and 9954 transitions. [2020-09-21 12:39:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-21 12:39:04,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:04,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:04,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:39:04,968 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1342832866, now seen corresponding path program 1 times [2020-09-21 12:39:04,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:04,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898868640] [2020-09-21 12:39:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:05,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:05,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:06,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:06,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:06,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-09-21 12:39:06,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:39:06,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-09-21 12:39:06,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-21 12:39:06,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:06,386 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-21 12:39:06,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:06,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:06,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:06,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:06,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:06,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 12:39:06,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:06,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:06,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:06,458 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 12:39:06,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898868640] [2020-09-21 12:39:06,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:06,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:06,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441291542] [2020-09-21 12:39:06,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:06,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:06,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:06,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:06,460 INFO L87 Difference]: Start difference. First operand 6997 states and 9954 transitions. Second operand 5 states.