/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 13:07:05,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 13:07:05,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 13:07:05,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 13:07:05,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 13:07:05,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 13:07:05,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 13:07:05,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 13:07:05,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 13:07:05,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 13:07:05,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 13:07:05,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 13:07:05,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 13:07:05,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 13:07:05,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 13:07:05,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 13:07:05,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 13:07:05,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 13:07:05,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 13:07:05,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 13:07:05,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 13:07:05,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 13:07:05,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 13:07:05,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 13:07:05,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 13:07:05,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 13:07:05,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 13:07:05,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 13:07:05,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 13:07:05,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 13:07:05,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 13:07:05,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 13:07:05,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 13:07:05,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 13:07:05,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 13:07:05,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 13:07:05,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 13:07:05,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 13:07:05,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 13:07:05,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 13:07:05,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 13:07:05,451 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 [2020-08-18 13:07:05,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 13:07:05,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 13:07:05,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 13:07:05,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 13:07:05,474 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 13:07:05,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 13:07:05,478 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 13:07:05,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 13:07:05,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 13:07:05,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 13:07:05,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 13:07:05,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 13:07:05,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 13:07:05,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 13:07:05,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 13:07:05,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 13:07:05,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 13:07:05,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 13:07:05,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 13:07:05,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 13:07:05,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 13:07:05,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:07:05,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 13:07:05,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 13:07:05,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 13:07:05,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 13:07:05,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 13:07:05,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 13:07:05,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 13:07:05,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 13:07:05,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 13:07:05,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 13:07:05,878 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 13:07:05,880 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 13:07:05,883 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 13:07:05,884 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-18 13:07:05,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a20d813/13d569e7d26f4ea5a346b278efd21dee/FLAGbe20208c6 [2020-08-18 13:07:06,612 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 13:07:06,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-18 13:07:06,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a20d813/13d569e7d26f4ea5a346b278efd21dee/FLAGbe20208c6 [2020-08-18 13:07:06,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a20d813/13d569e7d26f4ea5a346b278efd21dee [2020-08-18 13:07:06,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 13:07:06,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 13:07:06,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 13:07:06,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 13:07:06,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 13:07:06,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:07:06" (1/1) ... [2020-08-18 13:07:06,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee4d01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:06, skipping insertion in model container [2020-08-18 13:07:06,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:07:06" (1/1) ... [2020-08-18 13:07:06,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 13:07:06,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 13:07:08,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:07:08,132 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 13:07:08,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:07:08,618 INFO L208 MainTranslator]: Completed translation [2020-08-18 13:07:08,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08 WrapperNode [2020-08-18 13:07:08,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 13:07:08,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 13:07:08,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 13:07:08,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 13:07:08,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ... [2020-08-18 13:07:08,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ... [2020-08-18 13:07:08,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ... [2020-08-18 13:07:08,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ... [2020-08-18 13:07:08,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ... [2020-08-18 13:07:08,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ... [2020-08-18 13:07:08,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ... [2020-08-18 13:07:08,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 13:07:08,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 13:07:08,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 13:07:08,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 13:07:08,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (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 [2020-08-18 13:07:08,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 13:07:08,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 13:07:08,879 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 13:07:08,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 13:07:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 13:07:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 13:07:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 13:07:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 13:07:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 13:07:08,880 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 13:07:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 13:07:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 13:07:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 13:07:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 13:07:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 13:07:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 13:07:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 13:07:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 13:07:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 13:07:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 13:07:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 13:07:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 13:07:11,612 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 13:07:11,612 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 13:07:11,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:07:11 BoogieIcfgContainer [2020-08-18 13:07:11,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 13:07:11,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 13:07:11,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 13:07:11,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 13:07:11,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:07:06" (1/3) ... [2020-08-18 13:07:11,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf4e237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:07:11, skipping insertion in model container [2020-08-18 13:07:11,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (2/3) ... [2020-08-18 13:07:11,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf4e237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:07:11, skipping insertion in model container [2020-08-18 13:07:11,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:07:11" (3/3) ... [2020-08-18 13:07:11,646 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-18 13:07:11,658 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 13:07:11,674 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 13:07:11,691 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 13:07:11,734 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 13:07:11,734 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 13:07:11,734 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 13:07:11,734 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 13:07:11,734 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 13:07:11,735 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 13:07:11,735 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 13:07:11,735 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 13:07:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-08-18 13:07:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-18 13:07:11,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:11,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:11,820 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:11,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-08-18 13:07:11,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:11,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296933905] [2020-08-18 13:07:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:13,646 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 13:07:13,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:13,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296933905] [2020-08-18 13:07:13,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:13,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:13,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699314975] [2020-08-18 13:07:13,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:13,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:13,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:13,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:13,865 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-08-18 13:07:14,342 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-18 13:07:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:19,358 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-08-18 13:07:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:19,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-18 13:07:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:19,397 INFO L225 Difference]: With dead ends: 1527 [2020-08-18 13:07:19,398 INFO L226 Difference]: Without dead ends: 1311 [2020-08-18 13:07:19,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-08-18 13:07:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-08-18 13:07:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-08-18 13:07:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-08-18 13:07:19,565 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-08-18 13:07:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:19,572 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-08-18 13:07:19,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-08-18 13:07:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-18 13:07:19,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:19,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:19,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 13:07:19,585 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-08-18 13:07:19,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:19,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847461005] [2020-08-18 13:07:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:20,555 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 13:07:20,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:20,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847461005] [2020-08-18 13:07:20,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:20,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:20,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330662490] [2020-08-18 13:07:20,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:20,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:20,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:20,700 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-08-18 13:07:21,187 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-18 13:07:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:25,494 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-08-18 13:07:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:25,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-18 13:07:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:25,514 INFO L225 Difference]: With dead ends: 2683 [2020-08-18 13:07:25,515 INFO L226 Difference]: Without dead ends: 2301 [2020-08-18 13:07:25,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-08-18 13:07:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-08-18 13:07:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-08-18 13:07:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-08-18 13:07:25,674 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-08-18 13:07:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:25,676 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-08-18 13:07:25,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-08-18 13:07:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-18 13:07:25,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:25,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:25,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 13:07:25,699 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:25,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-08-18 13:07:25,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:25,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402670541] [2020-08-18 13:07:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:26,836 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 13:07:26,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:27,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402670541] [2020-08-18 13:07:27,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:27,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:27,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52237342] [2020-08-18 13:07:27,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:27,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:27,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:27,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:27,067 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-08-18 13:07:27,553 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-18 13:07:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:31,464 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-08-18 13:07:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:31,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-18 13:07:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:31,486 INFO L225 Difference]: With dead ends: 4867 [2020-08-18 13:07:31,487 INFO L226 Difference]: Without dead ends: 4201 [2020-08-18 13:07:31,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-08-18 13:07:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-08-18 13:07:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-08-18 13:07:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-08-18 13:07:31,621 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-08-18 13:07:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:31,622 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-08-18 13:07:31,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-08-18 13:07:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-18 13:07:31,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:31,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:31,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 13:07:31,633 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:31,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-08-18 13:07:31,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:31,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553846528] [2020-08-18 13:07:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:32,935 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 13:07:32,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:33,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553846528] [2020-08-18 13:07:33,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:33,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:07:33,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173340120] [2020-08-18 13:07:33,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:07:33,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:07:33,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:33,232 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-08-18 13:07:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:40,227 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-08-18 13:07:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:40,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-08-18 13:07:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:40,266 INFO L225 Difference]: With dead ends: 12414 [2020-08-18 13:07:40,267 INFO L226 Difference]: Without dead ends: 8230 [2020-08-18 13:07:40,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:07:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-08-18 13:07:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-08-18 13:07:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-08-18 13:07:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-08-18 13:07:40,621 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-08-18 13:07:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:40,622 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-08-18 13:07:40,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:07:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-08-18 13:07:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-18 13:07:40,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:40,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:40,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 13:07:40,651 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-08-18 13:07:40,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:40,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855427185] [2020-08-18 13:07:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:41,367 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 13:07:41,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:41,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855427185] [2020-08-18 13:07:41,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:41,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:41,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281685570] [2020-08-18 13:07:41,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:41,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:41,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:41,693 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2020-08-18 13:07:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:49,364 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-08-18 13:07:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 13:07:49,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-18 13:07:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:49,429 INFO L225 Difference]: With dead ends: 24233 [2020-08-18 13:07:49,429 INFO L226 Difference]: Without dead ends: 16134 [2020-08-18 13:07:49,445 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 [2020-08-18 13:07:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-08-18 13:07:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-08-18 13:07:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-08-18 13:07:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-08-18 13:07:49,939 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-08-18 13:07:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:49,940 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-08-18 13:07:49,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-08-18 13:07:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-18 13:07:49,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:49,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:49,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 13:07:49,975 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:49,979 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-08-18 13:07:49,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:49,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85926951] [2020-08-18 13:07:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:50,479 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 13:07:50,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:50,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85926951] [2020-08-18 13:07:50,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:50,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:50,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920898483] [2020-08-18 13:07:50,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:50,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:50,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:50,684 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states. [2020-08-18 13:07:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:58,822 INFO L93 Difference]: Finished difference Result 48321 states and 74099 transitions. [2020-08-18 13:07:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 13:07:58,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-18 13:07:58,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:58,885 INFO L225 Difference]: With dead ends: 48321 [2020-08-18 13:07:58,886 INFO L226 Difference]: Without dead ends: 32231 [2020-08-18 13:07:58,915 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 [2020-08-18 13:07:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2020-08-18 13:07:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151. [2020-08-18 13:07:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2020-08-18 13:07:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions. [2020-08-18 13:07:59,655 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332 [2020-08-18 13:07:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:59,656 INFO L479 AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions. [2020-08-18 13:07:59,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions. [2020-08-18 13:07:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-08-18 13:07:59,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:59,686 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] [2020-08-18 13:07:59,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 13:07:59,686 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times [2020-08-18 13:07:59,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:59,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308675305] [2020-08-18 13:07:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:08:00,189 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 13:08:00,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:08:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:08:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:08:00,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308675305] [2020-08-18 13:08:00,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:08:00,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:08:00,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633231655] [2020-08-18 13:08:00,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:08:00,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:08:00,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:08:00,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:08:00,266 INFO L87 Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states.