/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:33:44,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:33:44,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:33:44,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:33:44,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:33:44,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:33:44,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:33:44,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:33:44,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:33:44,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:33:44,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:33:44,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:33:44,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:33:44,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:33:44,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:33:44,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:33:44,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:33:44,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:33:44,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:33:44,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:33:44,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:33:44,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:33:44,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:33:44,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:33:44,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:33:44,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:33:44,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:33:44,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:33:44,900 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 [2020-08-22 01:33:44,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:33:44,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:33:44,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:33:44,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:33:44,941 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:33:44,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:33:44,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:33:44,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:33:44,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:33:44,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:33:44,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:33:44,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:33:44,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:33:44,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:33:44,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:33:44,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:33:44,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:33:44,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:33:44,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:33:44,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:33:44,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:33:44,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:33:44,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:33:44,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:33:44,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:33:44,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:33:44,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:33:44,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:33:44,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:33:44,947 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:33:45,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:33:45,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:33:45,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:33:45,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:33:45,250 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:33:45,250 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-22 01:33:45,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d91a2bd55/9e3f1b8516654505971b10b34b8906ba/FLAG74fcd4670 [2020-08-22 01:33:45,825 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:33:45,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-22 01:33:45,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d91a2bd55/9e3f1b8516654505971b10b34b8906ba/FLAG74fcd4670 [2020-08-22 01:33:46,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d91a2bd55/9e3f1b8516654505971b10b34b8906ba [2020-08-22 01:33:46,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:33:46,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:33:46,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:33:46,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:33:46,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:33:46,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117f8da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46, skipping insertion in model container [2020-08-22 01:33:46,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:33:46,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:33:46,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:33:46,653 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:33:46,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:33:46,780 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:33:46,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46 WrapperNode [2020-08-22 01:33:46,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:33:46,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:33:46,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:33:46,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:33:46,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (1/1) ... [2020-08-22 01:33:46,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:33:46,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:33:46,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:33:46,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:33:46,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (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 [2020-08-22 01:33:46,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:33:46,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:33:46,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:33:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:33:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-22 01:33:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-22 01:33:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:33:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:33:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 01:33:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:33:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 01:33:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 01:33:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 01:33:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:33:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:33:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 01:33:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 01:33:50,093 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:33:50,094 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:33:50,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:33:50 BoogieIcfgContainer [2020-08-22 01:33:50,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:33:50,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:33:50,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:33:50,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:33:50,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:33:46" (1/3) ... [2020-08-22 01:33:50,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecc8c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:33:50, skipping insertion in model container [2020-08-22 01:33:50,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:33:46" (2/3) ... [2020-08-22 01:33:50,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecc8c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:33:50, skipping insertion in model container [2020-08-22 01:33:50,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:33:50" (3/3) ... [2020-08-22 01:33:50,106 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-22 01:33:50,116 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:33:50,124 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:33:50,136 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:33:50,160 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:33:50,160 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:33:50,160 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:33:50,160 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:33:50,161 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:33:50,161 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:33:50,161 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:33:50,161 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:33:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-22 01:33:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 01:33:50,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:50,188 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] [2020-08-22 01:33:50,189 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-22 01:33:50,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:50,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985182253] [2020-08-22 01:33:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:51,138 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-22 01:33:51,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:51,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985182253] [2020-08-22 01:33:51,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:33:51,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 01:33:51,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747631345] [2020-08-22 01:33:51,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:33:51,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:33:51,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:33:51,340 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-22 01:33:51,635 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-22 01:34:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:34:12,703 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-22 01:34:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:34:12,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-22 01:34:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:34:12,717 INFO L225 Difference]: With dead ends: 92 [2020-08-22 01:34:12,717 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 01:34:12,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:34:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 01:34:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-22 01:34:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 01:34:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-22 01:34:12,767 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-22 01:34:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:34:12,768 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-22 01:34:12,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:34:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-22 01:34:12,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 01:34:12,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:34:12,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:34:12,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:34:12,771 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:34:12,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:34:12,771 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-22 01:34:12,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:34:12,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685388605] [2020-08-22 01:34:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:34:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:34:13,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:34:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:34:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:34:13,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685388605] [2020-08-22 01:34:13,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:34:13,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:34:13,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824316664] [2020-08-22 01:34:13,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:34:13,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:34:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:34:13,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:34:13,368 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-08-22 01:34:13,638 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-22 01:34:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:34:36,425 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-22 01:34:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:34:36,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-22 01:34:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:34:36,429 INFO L225 Difference]: With dead ends: 65 [2020-08-22 01:34:36,431 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 01:34:36,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:34:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 01:34:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-22 01:34:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 01:34:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-22 01:34:36,449 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-22 01:34:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:34:36,451 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-22 01:34:36,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:34:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-22 01:34:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:34:36,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:34:36,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:34:36,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:34:36,456 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:34:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:34:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-22 01:34:36,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:34:36,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342944411] [2020-08-22 01:34:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:34:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:34:37,093 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-22 01:34:37,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:34:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:34:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:34:37,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342944411] [2020-08-22 01:34:37,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:34:37,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:34:37,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236285073] [2020-08-22 01:34:37,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:34:37,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:34:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:34:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:34:37,152 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-08-22 01:35:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:35:02,340 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-22 01:35:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:35:02,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-08-22 01:35:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:35:02,347 INFO L225 Difference]: With dead ends: 70 [2020-08-22 01:35:02,347 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 01:35:02,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:35:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 01:35:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-22 01:35:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 01:35:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-22 01:35:02,364 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-22 01:35:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:35:02,367 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-22 01:35:02,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:35:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-22 01:35:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 01:35:02,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:35:02,373 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:35:02,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:35:02,373 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:35:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:35:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-22 01:35:02,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:35:02,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656541412] [2020-08-22 01:35:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:35:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:02,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:35:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:35:02,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656541412] [2020-08-22 01:35:02,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:35:02,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:35:02,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943222760] [2020-08-22 01:35:02,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:35:02,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:35:02,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:35:02,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:35:02,928 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2020-08-22 01:35:03,247 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 111