/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -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 02:06:04,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:06:04,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:06:04,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:06:04,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:06:04,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:06:04,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:06:04,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:06:04,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:06:04,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:06:04,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:06:04,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:06:04,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:06:04,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:06:04,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:06:04,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:06:04,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:06:04,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:06:04,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:06:04,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:06:04,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:06:04,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:06:04,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:06:04,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:06:04,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:06:04,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:06:04,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:06:04,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:06:04,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:06:04,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 02:06:04,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:06:04,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:06:04,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:06:04,483 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 02:06:04,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:06:04,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:06:04,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:06:04,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:06:04,527 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:06:04,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:06:04,528 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:06:04,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:06:04,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:06:04,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:06:04,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:06:04,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:06:04,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:06:04,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:06:04,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:06:04,531 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:06:04,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:06:04,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:06:04,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:06:04,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:06:04,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:06:04,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:06:04,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:06:04,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:06:04,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:06:04,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:06:04,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:06:04,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:06:04,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:06:04,534 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=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 02:06:04,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:06:04,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:06:04,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:06:04,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:06:04,854 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:06:04,854 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-08-19 02:06:04,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/423c964e9/c99239878aec462896ca574d5e1411e1/FLAGb46fc3278 [2020-08-19 02:06:05,483 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:06:05,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-08-19 02:06:05,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/423c964e9/c99239878aec462896ca574d5e1411e1/FLAGb46fc3278 [2020-08-19 02:06:05,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/423c964e9/c99239878aec462896ca574d5e1411e1 [2020-08-19 02:06:05,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:06:05,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:06:05,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:06:05,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:06:05,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:06:05,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:06:05" (1/1) ... [2020-08-19 02:06:05,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26497d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:05, skipping insertion in model container [2020-08-19 02:06:05,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:06:05" (1/1) ... [2020-08-19 02:06:05,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:06:05,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:06:06,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:06:06,096 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:06:06,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:06:06,275 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:06:06,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06 WrapperNode [2020-08-19 02:06:06,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:06:06,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:06:06,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:06:06,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:06:06,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (1/1) ... [2020-08-19 02:06:06,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (1/1) ... [2020-08-19 02:06:06,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (1/1) ... [2020-08-19 02:06:06,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (1/1) ... [2020-08-19 02:06:06,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (1/1) ... [2020-08-19 02:06:06,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (1/1) ... [2020-08-19 02:06:06,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (1/1) ... [2020-08-19 02:06:06,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:06:06,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:06:06,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:06:06,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:06:06,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (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 02:06:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:06:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:06:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:06:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:06:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-19 02:06:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-19 02:06:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:06:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:06:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:06:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:06:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 02:06:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-19 02:06:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 02:06:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:06:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:06:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 02:06:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 02:06:09,185 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:06:09,186 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:06:09,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:06:09 BoogieIcfgContainer [2020-08-19 02:06:09,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:06:09,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:06:09,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:06:09,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:06:09,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:06:05" (1/3) ... [2020-08-19 02:06:09,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e5f949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:06:09, skipping insertion in model container [2020-08-19 02:06:09,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:06" (2/3) ... [2020-08-19 02:06:09,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e5f949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:06:09, skipping insertion in model container [2020-08-19 02:06:09,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:06:09" (3/3) ... [2020-08-19 02:06:09,199 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-08-19 02:06:09,213 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:06:09,221 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:06:09,235 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:06:09,260 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:06:09,260 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:06:09,260 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:06:09,261 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:06:09,273 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:06:09,273 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:06:09,273 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:06:09,273 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:06:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-19 02:06:09,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 02:06:09,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:06:09,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:06:09,303 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:06:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:06:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2020-08-19 02:06:09,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:06:09,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340466301] [2020-08-19 02:06:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:06:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:09,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:06:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:09,787 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 02:06:09,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340466301] [2020-08-19 02:06:09,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:06:09,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:06:09,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559051283] [2020-08-19 02:06:09,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:06:09,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:06:09,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:06:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:06:09,820 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-08-19 02:06:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:06:12,037 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-08-19 02:06:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:06:12,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-19 02:06:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:06:12,052 INFO L225 Difference]: With dead ends: 38 [2020-08-19 02:06:12,052 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 02:06:12,057 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 02:06:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 02:06:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-08-19 02:06:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 02:06:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-19 02:06:12,096 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-08-19 02:06:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:06:12,097 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-19 02:06:12,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:06:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-19 02:06:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 02:06:12,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:06:12,098 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:06:12,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:06:12,099 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:06:12,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:06:12,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2020-08-19 02:06:12,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:06:12,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159209031] [2020-08-19 02:06:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:06:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:12,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:06:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:12,362 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 02:06:12,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159209031] [2020-08-19 02:06:12,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:06:12,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:06:12,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690509611] [2020-08-19 02:06:12,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:06:12,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:06:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:06:12,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:06:12,366 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-08-19 02:06:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:06:16,584 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-19 02:06:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:06:16,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-19 02:06:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:06:16,589 INFO L225 Difference]: With dead ends: 29 [2020-08-19 02:06:16,590 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 02:06:16,591 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 02:06:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 02:06:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-08-19 02:06:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 02:06:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-19 02:06:16,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-08-19 02:06:16,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:06:16,603 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-19 02:06:16,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:06:16,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-19 02:06:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:06:16,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:06:16,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:06:16,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:06:16,606 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:06:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:06:16,607 INFO L82 PathProgramCache]: Analyzing trace with hash 491744683, now seen corresponding path program 2 times [2020-08-19 02:06:16,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:06:16,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744114366] [2020-08-19 02:06:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:06:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:16,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:06:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:16,920 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 02:06:16,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744114366] [2020-08-19 02:06:16,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:06:16,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:06:16,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761608741] [2020-08-19 02:06:16,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:06:16,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:06:16,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:06:16,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:06:16,929 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-08-19 02:06:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:06:23,206 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-08-19 02:06:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:06:23,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-19 02:06:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:06:23,209 INFO L225 Difference]: With dead ends: 34 [2020-08-19 02:06:23,209 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 02:06:23,211 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 02:06:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 02:06:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-19 02:06:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 02:06:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-08-19 02:06:23,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-08-19 02:06:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:06:23,225 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-08-19 02:06:23,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:06:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-08-19 02:06:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 02:06:23,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:06:23,227 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:06:23,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:06:23,227 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:06:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:06:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash 161258737, now seen corresponding path program 3 times [2020-08-19 02:06:23,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:06:23,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047982494] [2020-08-19 02:06:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:06:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:23,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:06:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:23,484 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 02:06:23,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047982494] [2020-08-19 02:06:23,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:06:23,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:06:23,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644317876] [2020-08-19 02:06:23,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:06:23,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:06:23,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:06:23,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:06:23,490 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states. [2020-08-19 02:06:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:06:31,804 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-08-19 02:06:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:06:31,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-19 02:06:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:06:31,806 INFO L225 Difference]: With dead ends: 39 [2020-08-19 02:06:31,806 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 02:06:31,807 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 02:06:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 02:06:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-08-19 02:06:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 02:06:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-08-19 02:06:31,821 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-08-19 02:06:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:06:31,823 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-08-19 02:06:31,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:06:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-08-19 02:06:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 02:06:31,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:06:31,825 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:06:31,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:06:31,826 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:06:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:06:31,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 4 times [2020-08-19 02:06:31,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:06:31,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580313503] [2020-08-19 02:06:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:06:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:32,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:06:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:32,073 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 02:06:32,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580313503] [2020-08-19 02:06:32,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:06:32,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:06:32,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201059024] [2020-08-19 02:06:32,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:06:32,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:06:32,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:06:32,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:06:32,076 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2020-08-19 02:06:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:06:42,413 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-19 02:06:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:06:42,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-08-19 02:06:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:06:42,415 INFO L225 Difference]: With dead ends: 44 [2020-08-19 02:06:42,415 INFO L226 Difference]: Without dead ends: 41 [2020-08-19 02:06:42,416 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 02:06:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-19 02:06:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-08-19 02:06:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 02:06:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-08-19 02:06:42,423 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-08-19 02:06:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:06:42,423 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-08-19 02:06:42,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:06:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-08-19 02:06:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 02:06:42,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:06:42,427 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:06:42,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:06:42,427 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:06:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:06:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash -737191631, now seen corresponding path program 5 times [2020-08-19 02:06:42,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:06:42,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534181706] [2020-08-19 02:06:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:06:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:42,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:06:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:42,636 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 02:06:42,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534181706] [2020-08-19 02:06:42,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:06:42,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:06:42,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048657055] [2020-08-19 02:06:42,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:06:42,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:06:42,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:06:42,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:06:42,644 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-08-19 02:06:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:06:55,112 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-08-19 02:06:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:06:55,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-19 02:06:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:06:55,113 INFO L225 Difference]: With dead ends: 49 [2020-08-19 02:06:55,113 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 02:06:55,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:06:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 02:06:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-08-19 02:06:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 02:06:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-08-19 02:06:55,126 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-08-19 02:06:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:06:55,126 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-08-19 02:06:55,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:06:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-08-19 02:06:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 02:06:55,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:06:55,130 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:06:55,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:06:55,131 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:06:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:06:55,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1715407573, now seen corresponding path program 6 times [2020-08-19 02:06:55,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:06:55,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124735481] [2020-08-19 02:06:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:06:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:55,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:06:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:55,376 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 02:06:55,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124735481] [2020-08-19 02:06:55,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:06:55,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:06:55,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061046053] [2020-08-19 02:06:55,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:06:55,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:06:55,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:06:55,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:06:55,379 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 11 states. [2020-08-19 02:07:09,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:09,902 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-08-19 02:07:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:07:09,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-08-19 02:07:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:09,904 INFO L225 Difference]: With dead ends: 54 [2020-08-19 02:07:09,904 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 02:07:09,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:07:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 02:07:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-08-19 02:07:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 02:07:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-08-19 02:07:09,915 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-08-19 02:07:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:09,916 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-08-19 02:07:09,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:07:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-08-19 02:07:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 02:07:09,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:09,918 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:07:09,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:07:09,918 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -462174863, now seen corresponding path program 7 times [2020-08-19 02:07:09,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:09,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560413653] [2020-08-19 02:07:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:10,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:10,193 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 02:07:10,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560413653] [2020-08-19 02:07:10,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:07:10,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:07:10,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403948465] [2020-08-19 02:07:10,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:07:10,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:10,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:07:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:07:10,196 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 12 states.