/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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 03:10:51,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:10:51,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:10:51,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:10:51,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:10:51,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:10:51,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:10:51,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:10:51,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:10:51,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:10:51,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:10:51,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:10:51,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:10:51,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:10:51,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:10:51,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:10:51,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:10:51,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:10:51,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:10:51,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:10:51,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:10:51,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:10:51,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:10:51,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:10:51,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:10:51,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:10:51,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:10:51,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:10:51,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:10:51,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 03:10:51,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:10:51,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:10:51,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:10:51,984 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 03:10:52,038 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:10:52,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:10:52,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:10:52,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:10:52,041 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:10:52,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:10:52,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:10:52,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:10:52,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:10:52,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:10:52,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:10:52,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:10:52,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:10:52,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:10:52,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:10:52,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:10:52,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:10:52,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:10:52,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:10:52,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:10:52,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:10:52,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:10:52,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:10:52,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:10:52,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:10:52,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:10:52,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:10:52,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:10:52,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:10:52,048 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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 03:10:52,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:10:52,380 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:10:52,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:10:52,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:10:52,385 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:10:52,386 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-22 03:10:52,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a1d916cd/4bd7a3d6704f42a6b020ecdb1efb2034/FLAGf33981822 [2020-08-22 03:10:52,969 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:10:52,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-22 03:10:52,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a1d916cd/4bd7a3d6704f42a6b020ecdb1efb2034/FLAGf33981822 [2020-08-22 03:10:53,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a1d916cd/4bd7a3d6704f42a6b020ecdb1efb2034 [2020-08-22 03:10:53,304 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:10:53,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:10:53,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:10:53,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:10:53,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:10:53,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:53,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc622fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53, skipping insertion in model container [2020-08-22 03:10:53,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:53,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:10:53,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:10:53,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:10:53,715 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:10:53,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:10:53,940 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:10:53,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53 WrapperNode [2020-08-22 03:10:53,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:10:53,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:10:53,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:10:53,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:10:53,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:53,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:53,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:53,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:54,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:54,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:54,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (1/1) ... [2020-08-22 03:10:54,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:10:54,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:10:54,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:10:54,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:10:54,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (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 03:10:54,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:10:54,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:10:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:10:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:10:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-22 03:10:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-22 03:10:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:10:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 03:10:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 03:10:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 03:10:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 03:10:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 03:10:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 03:10:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:10:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:10:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 03:10:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 03:10:57,150 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:10:57,150 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:10:57,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:10:57 BoogieIcfgContainer [2020-08-22 03:10:57,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:10:57,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:10:57,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:10:57,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:10:57,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:10:53" (1/3) ... [2020-08-22 03:10:57,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffc5346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:10:57, skipping insertion in model container [2020-08-22 03:10:57,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:53" (2/3) ... [2020-08-22 03:10:57,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffc5346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:10:57, skipping insertion in model container [2020-08-22 03:10:57,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:10:57" (3/3) ... [2020-08-22 03:10:57,163 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-22 03:10:57,174 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:10:57,181 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:10:57,195 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:10:57,219 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:10:57,220 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:10:57,220 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:10:57,220 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:10:57,220 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:10:57,221 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:10:57,221 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:10:57,221 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:10:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-22 03:10:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 03:10:57,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:57,248 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 03:10:57,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:57,254 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-22 03:10:57,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:57,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727297609] [2020-08-22 03:10:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:58,128 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-22 03:10:58,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:58,193 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 03:10:58,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727297609] [2020-08-22 03:10:58,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:10:58,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 03:10:58,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345436395] [2020-08-22 03:10:58,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 03:10:58,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:58,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 03:10:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:10:58,220 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-22 03:10:58,480 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-22 03:11:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:11:19,576 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-22 03:11:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:11:19,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-22 03:11:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:11:19,598 INFO L225 Difference]: With dead ends: 92 [2020-08-22 03:11:19,598 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 03:11:19,604 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 03:11:19,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 03:11:19,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-22 03:11:19,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 03:11:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-22 03:11:19,660 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-22 03:11:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:11:19,661 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-22 03:11:19,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 03:11:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-22 03:11:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 03:11:19,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:11:19,664 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 03:11:19,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:11:19,665 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:11:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:11:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-22 03:11:19,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:11:19,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019502263] [2020-08-22 03:11:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:11:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:11:20,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:11:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:11:20,171 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 03:11:20,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019502263] [2020-08-22 03:11:20,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:11:20,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 03:11:20,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340244975] [2020-08-22 03:11:20,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 03:11:20,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:11:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 03:11:20,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:11:20,175 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-08-22 03:11:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:11:43,287 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-22 03:11:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 03:11:43,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-22 03:11:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:11:43,290 INFO L225 Difference]: With dead ends: 65 [2020-08-22 03:11:43,290 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 03:11:43,292 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 03:11:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 03:11:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-22 03:11:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 03:11:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-22 03:11:43,301 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-22 03:11:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:11:43,301 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-22 03:11:43,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 03:11:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-22 03:11:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 03:11:43,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:11:43,304 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 03:11:43,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:11:43,304 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:11:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:11:43,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-22 03:11:43,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:11:43,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476369231] [2020-08-22 03:11:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:11:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:11:43,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:11:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:11:43,876 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 03:11:43,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476369231] [2020-08-22 03:11:43,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:11:43,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 03:11:43,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545215707] [2020-08-22 03:11:43,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 03:11:43,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:11:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 03:11:43,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:11:43,888 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-08-22 03:12:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:12:09,075 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-22 03:12:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 03:12:09,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-08-22 03:12:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:12:09,078 INFO L225 Difference]: With dead ends: 70 [2020-08-22 03:12:09,079 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 03:12:09,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-22 03:12:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 03:12:09,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-22 03:12:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 03:12:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-22 03:12:09,089 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-22 03:12:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:12:09,090 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-22 03:12:09,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 03:12:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-22 03:12:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 03:12:09,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:12:09,092 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 03:12:09,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:12:09,092 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:12:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:12:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-22 03:12:09,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:12:09,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845734831] [2020-08-22 03:12:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:12:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:12:09,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:12:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:12:09,595 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 03:12:09,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845734831] [2020-08-22 03:12:09,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:12:09,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 03:12:09,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635089393] [2020-08-22 03:12:09,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 03:12:09,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:12:09,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 03:12:09,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:12:09,598 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2020-08-22 03:12:09,893 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 111