/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 false -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-c90d42b [2020-09-24 15:10:18,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:10:18,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:10:18,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:10:18,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:10:18,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:10:18,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:10:18,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:10:18,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:10:18,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:10:18,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:10:18,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:10:18,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:10:18,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:10:18,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:10:18,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:10:18,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:10:18,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:10:18,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:10:18,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:10:18,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:10:18,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:10:18,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:10:18,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:10:18,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:10:18,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:10:18,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:10:18,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:10:18,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:10:18,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:10:18,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:10:18,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:10:18,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:10:18,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:10:18,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:10:18,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:10:18,702 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 15:10:18,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:10:18,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:10:18,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:10:18,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:10:18,731 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:10:18,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:10:18,732 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:10:18,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:10:18,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:10:18,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:10:18,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:10:18,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:10:18,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:10:18,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:10:18,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:10:18,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:10:18,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:10:18,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:10:18,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:10:18,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:10:18,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:10:18,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:10:18,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:10:18,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:10:18,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:10:18,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:10:18,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:10:18,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:10:18,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:10:18,736 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 -> false [2020-09-24 15:10:19,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:10:19,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:10:19,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:10:19,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:10:19,211 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:10:19,212 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 15:10:19,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0985e545d/0ec323553710416094b8dd331983c75b/FLAG521a4f3e1 [2020-09-24 15:10:19,926 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:10:19,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 15:10:19,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0985e545d/0ec323553710416094b8dd331983c75b/FLAG521a4f3e1 [2020-09-24 15:10:20,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0985e545d/0ec323553710416094b8dd331983c75b [2020-09-24 15:10:20,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:10:20,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:10:20,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:10:20,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:10:20,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:10:20,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:10:20" (1/1) ... [2020-09-24 15:10:20,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e04f8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:20, skipping insertion in model container [2020-09-24 15:10:20,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:10:20" (1/1) ... [2020-09-24 15:10:20,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:10:20,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:10:20,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:10:20,878 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:10:21,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:10:21,073 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:10:21,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21 WrapperNode [2020-09-24 15:10:21,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:10:21,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:10:21,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:10:21,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:10:21,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (1/1) ... [2020-09-24 15:10:21,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (1/1) ... [2020-09-24 15:10:21,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (1/1) ... [2020-09-24 15:10:21,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (1/1) ... [2020-09-24 15:10:21,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (1/1) ... [2020-09-24 15:10:21,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (1/1) ... [2020-09-24 15:10:21,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (1/1) ... [2020-09-24 15:10:21,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:10:21,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:10:21,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:10:21,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:10:21,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (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 15:10:21,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:10:21,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:10:21,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 15:10:21,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:10:21,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:10:21,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 15:10:21,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 15:10:21,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 15:10:21,300 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 15:10:21,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 15:10:21,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 15:10:21,301 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 15:10:21,301 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 15:10:21,302 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 15:10:21,302 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 15:10:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 15:10:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 15:10:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 15:10:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:10:21,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:10:21,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:10:23,031 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:10:23,032 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 15:10:23,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:10:23 BoogieIcfgContainer [2020-09-24 15:10:23,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:10:23,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:10:23,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:10:23,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:10:23,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:10:20" (1/3) ... [2020-09-24 15:10:23,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f8d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:10:23, skipping insertion in model container [2020-09-24 15:10:23,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:21" (2/3) ... [2020-09-24 15:10:23,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f8d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:10:23, skipping insertion in model container [2020-09-24 15:10:23,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:10:23" (3/3) ... [2020-09-24 15:10:23,053 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 15:10:23,064 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:10:23,076 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:10:23,095 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:10:23,135 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:10:23,135 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:10:23,135 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:10:23,135 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:10:23,135 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:10:23,136 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:10:23,136 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:10:23,136 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:10:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 15:10:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-24 15:10:23,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:23,213 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] [2020-09-24 15:10:23,214 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-24 15:10:23,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:23,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447938862] [2020-09-24 15:10:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,621 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:10:24,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:25,149 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 15:10:25,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447938862] [2020-09-24 15:10:25,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:25,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:10:25,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319786799] [2020-09-24 15:10:25,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:10:25,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:10:25,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:10:25,193 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-24 15:10:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:30,751 INFO L93 Difference]: Finished difference Result 2066 states and 2749 transitions. [2020-09-24 15:10:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:10:30,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-24 15:10:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:30,793 INFO L225 Difference]: With dead ends: 2066 [2020-09-24 15:10:30,793 INFO L226 Difference]: Without dead ends: 1236 [2020-09-24 15:10:30,802 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 15:10:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-09-24 15:10:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1234. [2020-09-24 15:10:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-24 15:10:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1502 transitions. [2020-09-24 15:10:30,936 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1502 transitions. Word has length 407 [2020-09-24 15:10:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:30,938 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1502 transitions. [2020-09-24 15:10:30,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:10:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1502 transitions. [2020-09-24 15:10:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-24 15:10:30,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:30,954 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] [2020-09-24 15:10:30,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:10:30,955 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1024696889, now seen corresponding path program 1 times [2020-09-24 15:10:30,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:30,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689179613] [2020-09-24 15:10:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:31,397 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:10:31,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:31,577 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 15:10:31,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689179613] [2020-09-24 15:10:31,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:31,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:10:31,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405411181] [2020-09-24 15:10:31,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:10:31,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:10:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:10:31,585 INFO L87 Difference]: Start difference. First operand 1234 states and 1502 transitions. Second operand 4 states. [2020-09-24 15:10:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:36,140 INFO L93 Difference]: Finished difference Result 3323 states and 4103 transitions. [2020-09-24 15:10:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:10:36,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 408 [2020-09-24 15:10:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:36,160 INFO L225 Difference]: With dead ends: 3323 [2020-09-24 15:10:36,160 INFO L226 Difference]: Without dead ends: 2294 [2020-09-24 15:10:36,165 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 15:10:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2020-09-24 15:10:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1236. [2020-09-24 15:10:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1236 states. [2020-09-24 15:10:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1504 transitions. [2020-09-24 15:10:36,270 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1504 transitions. Word has length 408 [2020-09-24 15:10:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:36,275 INFO L479 AbstractCegarLoop]: Abstraction has 1236 states and 1504 transitions. [2020-09-24 15:10:36,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:10:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1504 transitions. [2020-09-24 15:10:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 15:10:36,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:36,289 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] [2020-09-24 15:10:36,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:10:36,290 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:36,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2025918869, now seen corresponding path program 1 times [2020-09-24 15:10:36,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:36,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118221269] [2020-09-24 15:10:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:36,904 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:10:36,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:37,113 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 15:10:37,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118221269] [2020-09-24 15:10:37,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:37,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:10:37,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141279376] [2020-09-24 15:10:37,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:10:37,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:37,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:10:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:10:37,125 INFO L87 Difference]: Start difference. First operand 1236 states and 1504 transitions. Second operand 4 states. [2020-09-24 15:10:41,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:41,225 INFO L93 Difference]: Finished difference Result 3066 states and 3785 transitions. [2020-09-24 15:10:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:10:41,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 409 [2020-09-24 15:10:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:41,238 INFO L225 Difference]: With dead ends: 3066 [2020-09-24 15:10:41,238 INFO L226 Difference]: Without dead ends: 2242 [2020-09-24 15:10:41,241 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 15:10:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-09-24 15:10:41,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2240. [2020-09-24 15:10:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2240 states. [2020-09-24 15:10:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2743 transitions. [2020-09-24 15:10:41,325 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2743 transitions. Word has length 409 [2020-09-24 15:10:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:41,326 INFO L479 AbstractCegarLoop]: Abstraction has 2240 states and 2743 transitions. [2020-09-24 15:10:41,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:10:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2743 transitions. [2020-09-24 15:10:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 15:10:41,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:41,334 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] [2020-09-24 15:10:41,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:10:41,335 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash 611806955, now seen corresponding path program 1 times [2020-09-24 15:10:41,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:41,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046710443] [2020-09-24 15:10:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:41,862 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:10:41,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:42,038 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 15:10:42,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046710443] [2020-09-24 15:10:42,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:42,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:10:42,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078904188] [2020-09-24 15:10:42,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:10:42,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:42,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:10:42,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:10:42,052 INFO L87 Difference]: Start difference. First operand 2240 states and 2743 transitions. Second operand 5 states. [2020-09-24 15:10:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:46,274 INFO L93 Difference]: Finished difference Result 5988 states and 7386 transitions. [2020-09-24 15:10:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:10:46,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-24 15:10:46,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:46,293 INFO L225 Difference]: With dead ends: 5988 [2020-09-24 15:10:46,293 INFO L226 Difference]: Without dead ends: 3924 [2020-09-24 15:10:46,298 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 15:10:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3924 states. [2020-09-24 15:10:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3924 to 3922. [2020-09-24 15:10:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3922 states. [2020-09-24 15:10:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 4795 transitions. [2020-09-24 15:10:46,437 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 4795 transitions. Word has length 409 [2020-09-24 15:10:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:46,438 INFO L479 AbstractCegarLoop]: Abstraction has 3922 states and 4795 transitions. [2020-09-24 15:10:46,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:10:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 4795 transitions. [2020-09-24 15:10:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 15:10:46,450 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:46,451 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] [2020-09-24 15:10:46,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:10:46,451 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-24 15:10:46,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:46,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820482991] [2020-09-24 15:10:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:46,960 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:10:46,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:47,194 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 15:10:47,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820482991] [2020-09-24 15:10:47,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:47,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:10:47,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417357173] [2020-09-24 15:10:47,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:10:47,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:10:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:10:47,197 INFO L87 Difference]: Start difference. First operand 3922 states and 4795 transitions. Second operand 5 states. [2020-09-24 15:10:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:51,319 INFO L93 Difference]: Finished difference Result 11041 states and 13536 transitions. [2020-09-24 15:10:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:10:51,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-24 15:10:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:51,358 INFO L225 Difference]: With dead ends: 11041 [2020-09-24 15:10:51,359 INFO L226 Difference]: Without dead ends: 7370 [2020-09-24 15:10:51,367 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 15:10:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2020-09-24 15:10:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 7368. [2020-09-24 15:10:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7368 states. [2020-09-24 15:10:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7368 states to 7368 states and 8968 transitions. [2020-09-24 15:10:51,605 INFO L78 Accepts]: Start accepts. Automaton has 7368 states and 8968 transitions. Word has length 409 [2020-09-24 15:10:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:51,605 INFO L479 AbstractCegarLoop]: Abstraction has 7368 states and 8968 transitions. [2020-09-24 15:10:51,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:10:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 7368 states and 8968 transitions. [2020-09-24 15:10:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-24 15:10:51,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:51,619 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] [2020-09-24 15:10:51,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:10:51,620 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:51,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1907351519, now seen corresponding path program 1 times [2020-09-24 15:10:51,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:51,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705187674] [2020-09-24 15:10:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:52,038 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:10:52,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:52,294 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 15:10:52,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705187674] [2020-09-24 15:10:52,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:52,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:10:52,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107368129] [2020-09-24 15:10:52,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:10:52,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:52,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:10:52,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:10:52,300 INFO L87 Difference]: Start difference. First operand 7368 states and 8968 transitions. Second operand 4 states. [2020-09-24 15:10:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:56,992 INFO L93 Difference]: Finished difference Result 21537 states and 26256 transitions. [2020-09-24 15:10:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:10:56,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2020-09-24 15:10:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:57,045 INFO L225 Difference]: With dead ends: 21537 [2020-09-24 15:10:57,046 INFO L226 Difference]: Without dead ends: 14470 [2020-09-24 15:10:57,060 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 15:10:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14470 states. [2020-09-24 15:10:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14470 to 7378. [2020-09-24 15:10:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7378 states. [2020-09-24 15:10:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 8978 transitions. [2020-09-24 15:10:57,344 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 8978 transitions. Word has length 410 [2020-09-24 15:10:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:57,345 INFO L479 AbstractCegarLoop]: Abstraction has 7378 states and 8978 transitions. [2020-09-24 15:10:57,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:10:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 8978 transitions. [2020-09-24 15:10:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-24 15:10:57,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:57,367 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] [2020-09-24 15:10:57,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:10:57,368 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash 663980441, now seen corresponding path program 1 times [2020-09-24 15:10:57,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:57,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053225057] [2020-09-24 15:10:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:57,784 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:10:57,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:10:58,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053225057] [2020-09-24 15:10:58,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:58,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:10:58,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155634946] [2020-09-24 15:10:58,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:10:58,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:58,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:10:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:10:58,056 INFO L87 Difference]: Start difference. First operand 7378 states and 8978 transitions. Second operand 4 states. [2020-09-24 15:11:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:11:02,758 INFO L93 Difference]: Finished difference Result 20111 states and 24532 transitions. [2020-09-24 15:11:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:11:02,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 411 [2020-09-24 15:11:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:11:02,786 INFO L225 Difference]: With dead ends: 20111 [2020-09-24 15:11:02,787 INFO L226 Difference]: Without dead ends: 14049 [2020-09-24 15:11:02,798 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 15:11:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14049 states. [2020-09-24 15:11:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14049 to 14047. [2020-09-24 15:11:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14047 states. [2020-09-24 15:11:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14047 states to 14047 states and 16994 transitions. [2020-09-24 15:11:03,206 INFO L78 Accepts]: Start accepts. Automaton has 14047 states and 16994 transitions. Word has length 411 [2020-09-24 15:11:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:11:03,207 INFO L479 AbstractCegarLoop]: Abstraction has 14047 states and 16994 transitions. [2020-09-24 15:11:03,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:11:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14047 states and 16994 transitions. [2020-09-24 15:11:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-24 15:11:03,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:11:03,233 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] [2020-09-24 15:11:03,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:11:03,234 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:11:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:11:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 928410137, now seen corresponding path program 1 times [2020-09-24 15:11:03,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:11:03,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836411814] [2020-09-24 15:11:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:11:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:03,732 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:11:03,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:11:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:03,926 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 15:11:03,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836411814] [2020-09-24 15:11:03,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:11:03,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:11:03,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060212291] [2020-09-24 15:11:03,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:11:03,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:11:03,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:11:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:11:03,930 INFO L87 Difference]: Start difference. First operand 14047 states and 16994 transitions. Second operand 5 states. [2020-09-24 15:11:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:11:08,578 INFO L93 Difference]: Finished difference Result 39701 states and 48051 transitions. [2020-09-24 15:11:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:11:08,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2020-09-24 15:11:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:11:08,632 INFO L225 Difference]: With dead ends: 39701 [2020-09-24 15:11:08,632 INFO L226 Difference]: Without dead ends: 25931 [2020-09-24 15:11:08,661 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 15:11:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25931 states. [2020-09-24 15:11:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25931 to 25929. [2020-09-24 15:11:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25929 states. [2020-09-24 15:11:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25929 states to 25929 states and 31173 transitions. [2020-09-24 15:11:09,541 INFO L78 Accepts]: Start accepts. Automaton has 25929 states and 31173 transitions. Word has length 411 [2020-09-24 15:11:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:11:09,542 INFO L479 AbstractCegarLoop]: Abstraction has 25929 states and 31173 transitions. [2020-09-24 15:11:09,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:11:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 25929 states and 31173 transitions. [2020-09-24 15:11:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-24 15:11:09,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:11:09,577 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] [2020-09-24 15:11:09,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:11:09,578 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:11:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:11:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1625460964, now seen corresponding path program 1 times [2020-09-24 15:11:09,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:11:09,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121137875] [2020-09-24 15:11:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:11:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:10,038 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:11:10,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:11:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:10,837 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 15:11:10,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121137875] [2020-09-24 15:11:10,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:11:10,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:11:10,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461846351] [2020-09-24 15:11:10,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:11:10,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:11:10,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:11:10,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:11:10,842 INFO L87 Difference]: Start difference. First operand 25929 states and 31173 transitions. Second operand 5 states. [2020-09-24 15:11:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:11:15,590 INFO L93 Difference]: Finished difference Result 52188 states and 62704 transitions. [2020-09-24 15:11:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:11:15,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2020-09-24 15:11:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:11:15,654 INFO L225 Difference]: With dead ends: 52188 [2020-09-24 15:11:15,654 INFO L226 Difference]: Without dead ends: 27013 [2020-09-24 15:11:15,693 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 15:11:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27013 states. [2020-09-24 15:11:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27013 to 26483. [2020-09-24 15:11:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26483 states. [2020-09-24 15:11:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26483 states to 26483 states and 31774 transitions. [2020-09-24 15:11:16,443 INFO L78 Accepts]: Start accepts. Automaton has 26483 states and 31774 transitions. Word has length 411 [2020-09-24 15:11:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:11:16,444 INFO L479 AbstractCegarLoop]: Abstraction has 26483 states and 31774 transitions. [2020-09-24 15:11:16,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:11:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 26483 states and 31774 transitions. [2020-09-24 15:11:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-09-24 15:11:16,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:11:16,475 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] [2020-09-24 15:11:16,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:11:16,475 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:11:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:11:16,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1241105107, now seen corresponding path program 1 times [2020-09-24 15:11:16,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:11:16,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234330163] [2020-09-24 15:11:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:11:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:16,919 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 15:11:16,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:11:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:11:17,044 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 15:11:17,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234330163] [2020-09-24 15:11:17,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:11:17,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:11:17,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038145206] [2020-09-24 15:11:17,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:11:17,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:11:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:11:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:11:17,047 INFO L87 Difference]: Start difference. First operand 26483 states and 31774 transitions. Second operand 4 states.