/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:31:31,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:31:31,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:31:31,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:31:31,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:31:31,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:31:31,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:31:31,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:31:31,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:31:31,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:31:31,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:31:31,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:31:31,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:31:31,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:31:31,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:31:31,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:31:31,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:31:31,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:31:31,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:31:31,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:31:31,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:31:31,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:31:31,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:31:31,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:31:31,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:31:31,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:31:31,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:31:31,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:31:31,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:31:31,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 04:31:31,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 04:31:31,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 04:31:31,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 04:31:31,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 04:31:31,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 04:31:31,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 04:31:31,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 04:31:31,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 04:31:31,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:31:31,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:31:31,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:31:31,799 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 [2020-08-19 04:31:31,824 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:31:31,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:31:31,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:31:31,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:31:31,826 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:31:31,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:31:31,827 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:31:31,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:31:31,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:31:31,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:31:31,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:31:31,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:31:31,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:31:31,828 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:31:31,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:31:31,829 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:31:31,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:31:31,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:31:31,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:31:31,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:31:31,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:31:31,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:31:31,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:31:31,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:31:31,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:31:31,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:31:31,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:31:31,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:31:31,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:31:31,831 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=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:31:32,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:31:32,173 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:31:32,176 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:31:32,178 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:31:32,179 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:31:32,180 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-08-19 04:31:32,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f38b58daa/ba5204676a5e4c4a87189612c42bd527/FLAGeb6231361 [2020-08-19 04:31:32,719 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:31:32,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-08-19 04:31:32,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f38b58daa/ba5204676a5e4c4a87189612c42bd527/FLAGeb6231361 [2020-08-19 04:31:33,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f38b58daa/ba5204676a5e4c4a87189612c42bd527 [2020-08-19 04:31:33,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:31:33,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:31:33,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:31:33,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:31:33,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:31:33,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b9b7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33, skipping insertion in model container [2020-08-19 04:31:33,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:31:33,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:31:33,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:31:33,405 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:31:33,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:31:33,593 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:31:33,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33 WrapperNode [2020-08-19 04:31:33,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:31:33,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:31:33,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:31:33,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:31:33,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (1/1) ... [2020-08-19 04:31:33,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:31:33,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:31:33,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:31:33,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:31:33,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (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 [2020-08-19 04:31:33,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:31:33,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:31:33,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:31:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:31:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-19 04:31:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-19 04:31:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:31:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 04:31:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 04:31:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 04:31:33,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 04:31:33,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-19 04:31:33,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 04:31:33,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:31:33,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:31:33,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 04:31:33,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 04:31:36,546 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:31:36,547 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 04:31:36,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:31:36 BoogieIcfgContainer [2020-08-19 04:31:36,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:31:36,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:31:36,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:31:36,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:31:36,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:31:33" (1/3) ... [2020-08-19 04:31:36,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2254d701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:31:36, skipping insertion in model container [2020-08-19 04:31:36,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:33" (2/3) ... [2020-08-19 04:31:36,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2254d701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:31:36, skipping insertion in model container [2020-08-19 04:31:36,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:31:36" (3/3) ... [2020-08-19 04:31:36,561 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-08-19 04:31:36,569 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:31:36,577 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:31:36,592 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:31:36,612 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:31:36,612 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:31:36,612 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:31:36,612 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:31:36,612 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:31:36,613 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:31:36,613 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:31:36,613 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:31:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-19 04:31:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 04:31:36,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:36,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:36,637 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:36,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:36,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2020-08-19 04:31:36,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:36,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628177094] [2020-08-19 04:31:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:37,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:37,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628177094] [2020-08-19 04:31:37,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:37,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:31:37,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256304520] [2020-08-19 04:31:37,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:31:37,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:31:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:31:37,169 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-08-19 04:31:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:39,373 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-08-19 04:31:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:31:39,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-19 04:31:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:39,387 INFO L225 Difference]: With dead ends: 38 [2020-08-19 04:31:39,387 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 04:31:39,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:31:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 04:31:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-08-19 04:31:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 04:31:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-19 04:31:39,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-08-19 04:31:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:39,436 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-19 04:31:39,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:31:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-19 04:31:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 04:31:39,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:39,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:39,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:31:39,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2020-08-19 04:31:39,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:39,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078819744] [2020-08-19 04:31:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:39,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:39,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078819744] [2020-08-19 04:31:39,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:39,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:31:39,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867543013] [2020-08-19 04:31:39,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:31:39,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:31:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:31:39,680 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-08-19 04:31:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:43,921 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-19 04:31:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:31:43,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-19 04:31:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:43,928 INFO L225 Difference]: With dead ends: 29 [2020-08-19 04:31:43,928 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 04:31:43,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:31:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 04:31:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-08-19 04:31:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 04:31:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-19 04:31:43,942 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-08-19 04:31:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:43,944 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-19 04:31:43,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:31:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-19 04:31:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:31:43,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:43,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:43,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:31:43,948 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:43,948 INFO L82 PathProgramCache]: Analyzing trace with hash 491744683, now seen corresponding path program 2 times [2020-08-19 04:31:43,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:43,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855974371] [2020-08-19 04:31:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:44,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:44,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855974371] [2020-08-19 04:31:44,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:44,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:31:44,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441898302] [2020-08-19 04:31:44,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:31:44,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:44,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:31:44,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:31:44,256 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-08-19 04:31:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:50,566 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-08-19 04:31:50,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:31:50,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-19 04:31:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:50,569 INFO L225 Difference]: With dead ends: 34 [2020-08-19 04:31:50,569 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 04:31:50,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:31:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 04:31:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-19 04:31:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 04:31:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-08-19 04:31:50,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-08-19 04:31:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:50,583 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-08-19 04:31:50,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:31:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-08-19 04:31:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 04:31:50,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:50,586 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:50,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:31:50,587 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash 161258737, now seen corresponding path program 3 times [2020-08-19 04:31:50,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:50,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695784082] [2020-08-19 04:31:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:50,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:50,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695784082] [2020-08-19 04:31:50,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:50,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:31:50,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298771879] [2020-08-19 04:31:50,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:31:50,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:31:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:31:50,851 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states. [2020-08-19 04:31:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:59,183 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-08-19 04:31:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:31:59,184 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-19 04:31:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:59,185 INFO L225 Difference]: With dead ends: 39 [2020-08-19 04:31:59,185 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 04:31:59,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:31:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 04:31:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-08-19 04:31:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 04:31:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-08-19 04:31:59,193 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-08-19 04:31:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:59,194 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-08-19 04:31:59,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:31:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-08-19 04:31:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 04:31:59,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:59,195 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:59,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:31:59,196 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 4 times [2020-08-19 04:31:59,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:59,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001832123] [2020-08-19 04:31:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:59,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:59,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001832123] [2020-08-19 04:31:59,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:59,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:31:59,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486415513] [2020-08-19 04:31:59,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:31:59,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:59,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:31:59,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:31:59,493 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2020-08-19 04:32:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:09,869 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-19 04:32:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:32:09,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-08-19 04:32:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:09,873 INFO L225 Difference]: With dead ends: 44 [2020-08-19 04:32:09,874 INFO L226 Difference]: Without dead ends: 41 [2020-08-19 04:32:09,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:32:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-19 04:32:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-08-19 04:32:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 04:32:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-08-19 04:32:09,882 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-08-19 04:32:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:09,882 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-08-19 04:32:09,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:32:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-08-19 04:32:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 04:32:09,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:09,883 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:09,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:32:09,884 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:09,884 INFO L82 PathProgramCache]: Analyzing trace with hash -737191631, now seen corresponding path program 5 times [2020-08-19 04:32:09,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:09,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729093161] [2020-08-19 04:32:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:10,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:10,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729093161] [2020-08-19 04:32:10,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:32:10,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:32:10,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738061041] [2020-08-19 04:32:10,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:32:10,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:10,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:32:10,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:32:10,116 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-08-19 04:32:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:22,573 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-08-19 04:32:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:32:22,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-19 04:32:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:22,575 INFO L225 Difference]: With dead ends: 49 [2020-08-19 04:32:22,575 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 04:32:22,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:32:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 04:32:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-08-19 04:32:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 04:32:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-08-19 04:32:22,595 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-08-19 04:32:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:22,595 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-08-19 04:32:22,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:32:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-08-19 04:32:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 04:32:22,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:22,600 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:22,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:32:22,600 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:22,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1715407573, now seen corresponding path program 6 times [2020-08-19 04:32:22,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:22,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913971492] [2020-08-19 04:32:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:22,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:22,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913971492] [2020-08-19 04:32:22,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:32:22,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:32:22,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682091964] [2020-08-19 04:32:22,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:32:22,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:22,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:32:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:32:22,915 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 11 states. [2020-08-19 04:32:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:37,473 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-08-19 04:32:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 04:32:37,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-08-19 04:32:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:37,477 INFO L225 Difference]: With dead ends: 54 [2020-08-19 04:32:37,477 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 04:32:37,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:32:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 04:32:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-08-19 04:32:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 04:32:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-08-19 04:32:37,489 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-08-19 04:32:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:37,494 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-08-19 04:32:37,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:32:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-08-19 04:32:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 04:32:37,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:37,499 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:37,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:32:37,499 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash -462174863, now seen corresponding path program 7 times [2020-08-19 04:32:37,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:37,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357834308] [2020-08-19 04:32:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:37,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:37,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357834308] [2020-08-19 04:32:37,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:32:37,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 04:32:37,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772837158] [2020-08-19 04:32:37,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:32:37,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:37,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:32:37,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:32:37,851 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 12 states.