/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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 interpolation-heuristic=FIRST --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.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:12:46,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:12:46,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:12:46,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:12:46,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:12:46,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:12:46,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:12:46,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:12:46,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:12:46,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:12:46,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:12:46,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:12:46,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:12:46,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:12:46,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:12:46,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:12:46,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:12:46,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:12:46,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:12:46,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:12:46,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:12:46,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:12:46,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:12:46,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:12:46,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:12:46,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:12:46,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:12:46,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:12:46,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:12:46,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:12:46,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:12:46,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:12:46,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:12:46,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:12:46,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:12:46,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:12:46,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:12:46,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:12:46,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:12:46,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:12:46,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:12:46,846 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 [2020-09-24 16:12:46,903 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:12:46,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:12:46,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:12:46,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:12:46,906 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:12:46,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:12:46,906 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:12:46,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:12:46,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:12:46,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:12:46,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:12:46,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:12:46,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:12:46,910 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:12:46,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:12:46,910 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:12:46,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:12:46,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:12:46,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:12:46,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:12:46,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:12:46,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:12:46,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:12:46,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:12:46,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:12:46,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:12:46,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:12:46,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:12:46,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:12:46,913 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.rcfgbuilder: Size of a code block -> SingleStatement 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:12:47,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:12:47,401 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:12:47,406 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:12:47,408 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:12:47,408 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:12:47,410 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 16:12:47,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21fba4125/a414b7a353bd4bd0976d575947fdf152/FLAG982969a03 [2020-09-24 16:12:48,165 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:12:48,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 16:12:48,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21fba4125/a414b7a353bd4bd0976d575947fdf152/FLAG982969a03 [2020-09-24 16:12:48,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21fba4125/a414b7a353bd4bd0976d575947fdf152 [2020-09-24 16:12:48,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:12:48,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:12:48,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:12:48,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:12:48,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:12:48,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:12:48" (1/1) ... [2020-09-24 16:12:48,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8831ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:48, skipping insertion in model container [2020-09-24 16:12:48,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:12:48" (1/1) ... [2020-09-24 16:12:48,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:12:48,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:12:49,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:12:49,334 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:12:49,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:12:49,758 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:12:49,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49 WrapperNode [2020-09-24 16:12:49,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:12:49,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:12:49,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:12:49,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:12:49,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (1/1) ... [2020-09-24 16:12:49,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (1/1) ... [2020-09-24 16:12:49,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (1/1) ... [2020-09-24 16:12:49,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (1/1) ... [2020-09-24 16:12:49,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (1/1) ... [2020-09-24 16:12:49,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (1/1) ... [2020-09-24 16:12:49,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (1/1) ... [2020-09-24 16:12:49,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:12:49,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:12:49,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:12:49,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:12:49,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (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 [2020-09-24 16:12:50,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:12:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:12:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 16:12:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:12:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:12:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 16:12:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 16:12:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 16:12:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 16:12:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 16:12:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 16:12:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 16:12:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 16:12:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 16:12:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 16:12:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 16:12:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 16:12:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:12:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:12:50,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:12:52,183 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:12:52,189 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 16:12:52,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:12:52 BoogieIcfgContainer [2020-09-24 16:12:52,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:12:52,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:12:52,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:12:52,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:12:52,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:12:48" (1/3) ... [2020-09-24 16:12:52,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9cde2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:12:52, skipping insertion in model container [2020-09-24 16:12:52,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:49" (2/3) ... [2020-09-24 16:12:52,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9cde2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:12:52, skipping insertion in model container [2020-09-24 16:12:52,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:12:52" (3/3) ... [2020-09-24 16:12:52,213 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 16:12:52,226 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:12:52,238 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-24 16:12:52,261 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-24 16:12:52,300 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:12:52,300 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:12:52,301 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:12:52,301 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:12:52,301 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:12:52,301 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:12:52,301 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:12:52,301 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:12:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states. [2020-09-24 16:12:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-24 16:12:52,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:52,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:52,385 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash -219806221, now seen corresponding path program 1 times [2020-09-24 16:12:52,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:52,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389374006] [2020-09-24 16:12:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:52,974 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:52,974 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:52,975 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:52,975 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:52,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-24 16:12:52,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:52,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 16:12:52,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:12:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-09-24 16:12:52,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-24 16:12:52,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:53,857 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 16:12:53,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:53,876 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:53,877 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:53,878 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:53,878 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:53,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:12:53,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:53,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:12:53,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:53,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:53,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:54,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389374006] [2020-09-24 16:12:54,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:12:54,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:12:54,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392305229] [2020-09-24 16:12:54,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:12:54,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:12:54,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:12:54,240 INFO L87 Difference]: Start difference. First operand 1127 states. Second operand 4 states. [2020-09-24 16:12:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:58,671 INFO L93 Difference]: Finished difference Result 1833 states and 2360 transitions. [2020-09-24 16:12:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:12:58,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-09-24 16:12:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:58,707 INFO L225 Difference]: With dead ends: 1833 [2020-09-24 16:12:58,707 INFO L226 Difference]: Without dead ends: 1303 [2020-09-24 16:12:58,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:12:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-09-24 16:12:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1296. [2020-09-24 16:12:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-09-24 16:12:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1545 transitions. [2020-09-24 16:12:58,859 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1545 transitions. Word has length 423 [2020-09-24 16:12:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:58,865 INFO L479 AbstractCegarLoop]: Abstraction has 1296 states and 1545 transitions. [2020-09-24 16:12:58,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:12:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1545 transitions. [2020-09-24 16:12:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-24 16:12:58,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:58,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:58,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:12:58,879 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash -74379501, now seen corresponding path program 1 times [2020-09-24 16:12:58,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:58,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075346925] [2020-09-24 16:12:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:59,163 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:59,163 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:59,164 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:59,164 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:59,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-24 16:12:59,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:59,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 16:12:59,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:12:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-24 16:12:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 16:12:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:59,731 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 16:12:59,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:59,743 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:59,743 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:59,743 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:59,744 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:59,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:12:59,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:59,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:59,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:59,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:59,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:59,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:59,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:13:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:00,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075346925] [2020-09-24 16:13:00,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:00,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:00,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857243467] [2020-09-24 16:13:00,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:00,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:00,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:00,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:00,024 INFO L87 Difference]: Start difference. First operand 1296 states and 1545 transitions. Second operand 5 states. [2020-09-24 16:13:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:06,350 INFO L93 Difference]: Finished difference Result 3469 states and 4190 transitions. [2020-09-24 16:13:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:13:06,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2020-09-24 16:13:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:06,363 INFO L225 Difference]: With dead ends: 3469 [2020-09-24 16:13:06,363 INFO L226 Difference]: Without dead ends: 2356 [2020-09-24 16:13:06,367 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 [2020-09-24 16:13:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2020-09-24 16:13:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2234. [2020-09-24 16:13:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2234 states. [2020-09-24 16:13:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 2699 transitions. [2020-09-24 16:13:06,458 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 2699 transitions. Word has length 423 [2020-09-24 16:13:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:06,460 INFO L479 AbstractCegarLoop]: Abstraction has 2234 states and 2699 transitions. [2020-09-24 16:13:06,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:13:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 2699 transitions. [2020-09-24 16:13:06,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-09-24 16:13:06,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:06,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:06,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:13:06,469 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:06,469 INFO L82 PathProgramCache]: Analyzing trace with hash -860561599, now seen corresponding path program 1 times [2020-09-24 16:13:06,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:06,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032136099] [2020-09-24 16:13:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:06,585 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:06,586 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:06,586 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:06,586 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:06,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-09-24 16:13:06,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:06,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:13:06,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:06,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:06,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-09-24 16:13:06,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:13:06,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:06,976 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 16:13:06,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:06,989 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:06,990 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:06,990 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:06,991 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:06,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:13:06,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:06,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:06,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:06,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:06,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:13:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:07,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032136099] [2020-09-24 16:13:07,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:07,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:07,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871252366] [2020-09-24 16:13:07,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:07,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:07,245 INFO L87 Difference]: Start difference. First operand 2234 states and 2699 transitions. Second operand 4 states. [2020-09-24 16:13:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:13,488 INFO L93 Difference]: Finished difference Result 6299 states and 7670 transitions. [2020-09-24 16:13:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:13:13,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 424 [2020-09-24 16:13:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:13,507 INFO L225 Difference]: With dead ends: 6299 [2020-09-24 16:13:13,507 INFO L226 Difference]: Without dead ends: 4282 [2020-09-24 16:13:13,512 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 [2020-09-24 16:13:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2020-09-24 16:13:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 2236. [2020-09-24 16:13:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2236 states. [2020-09-24 16:13:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 2701 transitions. [2020-09-24 16:13:13,613 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 2701 transitions. Word has length 424 [2020-09-24 16:13:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:13,613 INFO L479 AbstractCegarLoop]: Abstraction has 2236 states and 2701 transitions. [2020-09-24 16:13:13,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:13:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 2701 transitions. [2020-09-24 16:13:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-24 16:13:13,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:13,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:13,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:13:13,621 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:13,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1010739082, now seen corresponding path program 1 times [2020-09-24 16:13:13,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:13,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105444832] [2020-09-24 16:13:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:13,734 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:13,735 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:13,735 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:13,735 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:13,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-09-24 16:13:13,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:13,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:13:13,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:13,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-09-24 16:13:13,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 16:13:13,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:13:14,159 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 16:13:14,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:14,169 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:14,169 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:14,169 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:14,170 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:14,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:13:14,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:14,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:14,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:14,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:14,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:14,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:14,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:14,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105444832] [2020-09-24 16:13:14,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:14,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:14,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53305868] [2020-09-24 16:13:14,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:14,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:14,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:14,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:14,383 INFO L87 Difference]: Start difference. First operand 2236 states and 2701 transitions. Second operand 4 states. [2020-09-24 16:13:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:20,200 INFO L93 Difference]: Finished difference Result 5992 states and 7288 transitions. [2020-09-24 16:13:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:13:20,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 425 [2020-09-24 16:13:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:20,219 INFO L225 Difference]: With dead ends: 5992 [2020-09-24 16:13:20,219 INFO L226 Difference]: Without dead ends: 4182 [2020-09-24 16:13:20,223 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 [2020-09-24 16:13:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2020-09-24 16:13:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 4060. [2020-09-24 16:13:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4060 states. [2020-09-24 16:13:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 4932 transitions. [2020-09-24 16:13:20,356 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 4932 transitions. Word has length 425 [2020-09-24 16:13:20,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:20,357 INFO L479 AbstractCegarLoop]: Abstraction has 4060 states and 4932 transitions. [2020-09-24 16:13:20,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:13:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 4932 transitions. [2020-09-24 16:13:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-24 16:13:20,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:20,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:20,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:13:20,367 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:20,367 INFO L82 PathProgramCache]: Analyzing trace with hash 398825718, now seen corresponding path program 1 times [2020-09-24 16:13:20,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:20,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044809121] [2020-09-24 16:13:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:20,537 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:20,537 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:20,537 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:20,537 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:20,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-09-24 16:13:20,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:20,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 16:13:20,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:13:20,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-09-24 16:13:20,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 16:13:20,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:20,985 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 16:13:20,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:20,994 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:20,994 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:20,994 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:20,995 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:20,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:13:20,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:20,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:20,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:21,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044809121] [2020-09-24 16:13:21,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:21,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:21,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801867077] [2020-09-24 16:13:21,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:21,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:21,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:21,230 INFO L87 Difference]: Start difference. First operand 4060 states and 4932 transitions. Second operand 5 states. [2020-09-24 16:13:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:26,886 INFO L93 Difference]: Finished difference Result 11306 states and 13778 transitions. [2020-09-24 16:13:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:13:26,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 425 [2020-09-24 16:13:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:26,916 INFO L225 Difference]: With dead ends: 11306 [2020-09-24 16:13:26,917 INFO L226 Difference]: Without dead ends: 7434 [2020-09-24 16:13:26,925 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 [2020-09-24 16:13:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7434 states. [2020-09-24 16:13:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7434 to 7321. [2020-09-24 16:13:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7321 states. [2020-09-24 16:13:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 8875 transitions. [2020-09-24 16:13:27,140 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 8875 transitions. Word has length 425 [2020-09-24 16:13:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:27,141 INFO L479 AbstractCegarLoop]: Abstraction has 7321 states and 8875 transitions. [2020-09-24 16:13:27,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:13:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 8875 transitions. [2020-09-24 16:13:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-24 16:13:27,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:27,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:27,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:13:27,157 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 481574245, now seen corresponding path program 1 times [2020-09-24 16:13:27,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:27,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732783694] [2020-09-24 16:13:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:27,309 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:27,309 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:27,310 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:27,311 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:27,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-09-24 16:13:27,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:27,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 16:13:27,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:27,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:13:27,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-24 16:13:27,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 16:13:27,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:27,713 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 16:13:27,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:27,721 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:27,721 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:27,721 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:27,721 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:27,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:13:27,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:27,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:27,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:27,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:27,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:27,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:27,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 16:13:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:27,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732783694] [2020-09-24 16:13:27,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:27,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:27,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993203303] [2020-09-24 16:13:27,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:27,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:27,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:27,994 INFO L87 Difference]: Start difference. First operand 7321 states and 8875 transitions. Second operand 5 states. [2020-09-24 16:13:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:33,596 INFO L93 Difference]: Finished difference Result 21038 states and 25512 transitions. [2020-09-24 16:13:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:13:33,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 425 [2020-09-24 16:13:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:33,645 INFO L225 Difference]: With dead ends: 21038 [2020-09-24 16:13:33,645 INFO L226 Difference]: Without dead ends: 13980 [2020-09-24 16:13:33,659 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 [2020-09-24 16:13:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13980 states. [2020-09-24 16:13:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13980 to 13853. [2020-09-24 16:13:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13853 states. [2020-09-24 16:13:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13853 states to 13853 states and 16718 transitions. [2020-09-24 16:13:33,980 INFO L78 Accepts]: Start accepts. Automaton has 13853 states and 16718 transitions. Word has length 425 [2020-09-24 16:13:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:33,981 INFO L479 AbstractCegarLoop]: Abstraction has 13853 states and 16718 transitions. [2020-09-24 16:13:33,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:13:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13853 states and 16718 transitions. [2020-09-24 16:13:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-09-24 16:13:34,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:34,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:34,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:13:34,006 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2068542717, now seen corresponding path program 1 times [2020-09-24 16:13:34,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:34,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998904066] [2020-09-24 16:13:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:34,068 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:34,069 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:34,069 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:34,069 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:34,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 433 [2020-09-24 16:13:34,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:34,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:13:34,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-09-24 16:13:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:13:34,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:34,454 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 16:13:34,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:34,461 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:34,461 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:34,462 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:34,462 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:34,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:13:34,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:34,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:34,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:34,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998904066] [2020-09-24 16:13:34,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:34,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:34,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301306000] [2020-09-24 16:13:34,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:34,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:34,727 INFO L87 Difference]: Start difference. First operand 13853 states and 16718 transitions. Second operand 4 states. [2020-09-24 16:13:41,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:41,483 INFO L93 Difference]: Finished difference Result 40968 states and 49482 transitions. [2020-09-24 16:13:41,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:13:41,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 426 [2020-09-24 16:13:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:41,540 INFO L225 Difference]: With dead ends: 40968 [2020-09-24 16:13:41,540 INFO L226 Difference]: Without dead ends: 27428 [2020-09-24 16:13:41,565 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 [2020-09-24 16:13:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27428 states. [2020-09-24 16:13:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27428 to 13863. [2020-09-24 16:13:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13863 states. [2020-09-24 16:13:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13863 states to 13863 states and 16728 transitions. [2020-09-24 16:13:42,033 INFO L78 Accepts]: Start accepts. Automaton has 13863 states and 16728 transitions. Word has length 426 [2020-09-24 16:13:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:42,033 INFO L479 AbstractCegarLoop]: Abstraction has 13863 states and 16728 transitions. [2020-09-24 16:13:42,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:13:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13863 states and 16728 transitions. [2020-09-24 16:13:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-09-24 16:13:42,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:42,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:42,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:13:42,052 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash 148387208, now seen corresponding path program 1 times [2020-09-24 16:13:42,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:42,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89524122] [2020-09-24 16:13:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:42,250 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:42,250 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:42,250 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:42,251 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:42,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-09-24 16:13:42,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:42,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:13:42,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 186 [2020-09-24 16:13:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-24 16:13:42,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:42,646 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 16:13:42,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:42,655 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:42,655 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:42,655 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:42,655 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:42,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:13:42,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:42,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:42,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:42,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:42,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:42,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89524122] [2020-09-24 16:13:42,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:42,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:42,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059563231] [2020-09-24 16:13:42,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:42,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:42,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:42,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:42,811 INFO L87 Difference]: Start difference. First operand 13863 states and 16728 transitions. Second operand 4 states.