/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:40:55,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:40:55,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:40:55,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:40:55,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:40:55,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:40:55,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:40:55,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:40:55,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:40:55,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:40:55,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:40:55,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:40:55,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:40:55,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:40:55,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:40:55,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:40:55,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:40:55,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:40:55,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:40:55,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:40:55,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:40:55,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:40:55,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:40:55,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:40:55,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:40:55,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:40:55,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:40:55,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:40:55,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:40:55,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:40:55,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:40:55,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:40:55,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:40:55,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:40:55,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:40:55,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:40:55,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:40:55,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:40:55,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:40:55,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:40:55,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:40:55,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 18:40:55,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:40:55,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:40:55,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:40:55,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:40:55,622 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:40:55,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:40:55,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:40:55,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:40:55,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:40:55,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:40:55,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:40:55,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:40:55,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:40:55,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:40:55,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:40:55,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:40:55,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:40:55,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:40:55,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:40:55,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:40:55,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:40:55,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:40:55,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:40:55,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:40:55,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:40:55,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:40:55,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:40:55,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:40:55,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:40:55,627 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:40:55,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:40:55,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:40:55,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:40:55,964 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:40:55,965 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:40:55,965 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-18 18:40:56,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72388d8e2/d2b36c60761546b8b2a6bdeab8da18fe/FLAG4c9ad784b [2020-08-18 18:40:56,457 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:40:56,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-18 18:40:56,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72388d8e2/d2b36c60761546b8b2a6bdeab8da18fe/FLAG4c9ad784b [2020-08-18 18:40:56,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72388d8e2/d2b36c60761546b8b2a6bdeab8da18fe [2020-08-18 18:40:56,894 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:40:56,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:40:56,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:40:56,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:40:56,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:40:56,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2748618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56, skipping insertion in model container [2020-08-18 18:40:56,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:40:56,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:40:57,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:40:57,162 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:40:57,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:40:57,197 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:40:57,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57 WrapperNode [2020-08-18 18:40:57,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:40:57,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:40:57,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:40:57,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:40:57,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:40:57,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:40:57,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:40:57,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:40:57,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:40:57,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:40:57,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:40:57,403 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 18:40:57,404 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 18:40:57,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:40:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 18:40:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:40:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 18:40:57,406 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 18:40:57,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:40:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:40:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:40:57,606 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:40:57,606 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:40:57,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:40:57 BoogieIcfgContainer [2020-08-18 18:40:57,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:40:57,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:40:57,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:40:57,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:40:57,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:40:56" (1/3) ... [2020-08-18 18:40:57,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389b38de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:40:57, skipping insertion in model container [2020-08-18 18:40:57,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (2/3) ... [2020-08-18 18:40:57,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389b38de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:40:57, skipping insertion in model container [2020-08-18 18:40:57,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:40:57" (3/3) ... [2020-08-18 18:40:57,620 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-08-18 18:40:57,631 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:40:57,639 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:40:57,653 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:40:57,680 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:40:57,680 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:40:57,680 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:40:57,680 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:40:57,681 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:40:57,681 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:40:57,681 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:40:57,681 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:40:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 18:40:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:40:57,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:57,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:57,709 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 18:40:57,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:57,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327933978] [2020-08-18 18:40:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:40:58,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327933978] [2020-08-18 18:40:58,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:58,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:58,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761903282] [2020-08-18 18:40:58,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:58,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:58,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,100 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 18:40:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,161 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 18:40:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:58,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 18:40:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,174 INFO L225 Difference]: With dead ends: 40 [2020-08-18 18:40:58,174 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 18:40:58,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 18:40:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 18:40:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:40:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 18:40:58,228 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 18:40:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,229 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 18:40:58,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 18:40:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:40:58,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,233 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] [2020-08-18 18:40:58,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:40:58,234 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 18:40:58,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946217798] [2020-08-18 18:40:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:40:58,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946217798] [2020-08-18 18:40:58,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:58,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:58,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749449591] [2020-08-18 18:40:58,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:58,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:58,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,409 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 18:40:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,433 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 18:40:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:58,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 18:40:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,436 INFO L225 Difference]: With dead ends: 32 [2020-08-18 18:40:58,436 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 18:40:58,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 18:40:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 18:40:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:40:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 18:40:58,445 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 18:40:58,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,446 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 18:40:58,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 18:40:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:40:58,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,448 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] [2020-08-18 18:40:58,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:40:58,449 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 18:40:58,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435541467] [2020-08-18 18:40:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:40:58,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435541467] [2020-08-18 18:40:58,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:58,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:40:58,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9110871] [2020-08-18 18:40:58,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:40:58,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:40:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:40:58,700 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 18:40:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,771 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 18:40:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:40:58,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 18:40:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,773 INFO L225 Difference]: With dead ends: 48 [2020-08-18 18:40:58,774 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 18:40:58,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:40:58,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 18:40:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 18:40:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 18:40:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 18:40:58,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 18:40:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,784 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 18:40:58,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:40:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 18:40:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:40:58,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,786 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] [2020-08-18 18:40:58,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:40:58,787 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 18:40:58,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513120262] [2020-08-18 18:40:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:40:58,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513120262] [2020-08-18 18:40:58,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:58,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:58,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499798082] [2020-08-18 18:40:58,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:58,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,953 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 18:40:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,980 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 18:40:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:58,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 18:40:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,983 INFO L225 Difference]: With dead ends: 50 [2020-08-18 18:40:58,983 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 18:40:58,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 18:40:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 18:40:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 18:40:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 18:40:58,993 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 18:40:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,993 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 18:40:58,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 18:40:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:40:58,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,995 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] [2020-08-18 18:40:58,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:40:58,996 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 18:40:58,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18908053] [2020-08-18 18:40:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:40:59,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18908053] [2020-08-18 18:40:59,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:59,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:40:59,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257655902] [2020-08-18 18:40:59,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:40:59,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:59,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:40:59,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:40:59,256 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-18 18:40:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:59,373 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-18 18:40:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:40:59,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-18 18:40:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:59,375 INFO L225 Difference]: With dead ends: 64 [2020-08-18 18:40:59,376 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 18:40:59,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:40:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 18:40:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-18 18:40:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 18:40:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-18 18:40:59,385 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-18 18:40:59,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:59,386 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-18 18:40:59,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:40:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-18 18:40:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 18:40:59,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:59,387 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:59,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:40:59,388 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:59,388 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-18 18:40:59,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:59,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979539842] [2020-08-18 18:40:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 18:40:59,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979539842] [2020-08-18 18:40:59,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:59,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 18:40:59,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102954762] [2020-08-18 18:40:59,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 18:40:59,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:59,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 18:40:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:40:59,779 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-18 18:40:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:59,962 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-08-18 18:40:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:40:59,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-18 18:40:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:59,965 INFO L225 Difference]: With dead ends: 74 [2020-08-18 18:40:59,965 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 18:40:59,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:40:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 18:40:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-08-18 18:40:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 18:40:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-18 18:40:59,974 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-18 18:40:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:59,974 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-18 18:40:59,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 18:40:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-18 18:40:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 18:40:59,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:59,976 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:59,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:40:59,977 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-18 18:40:59,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:59,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198209714] [2020-08-18 18:40:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-18 18:41:00,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198209714] [2020-08-18 18:41:00,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:00,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 18:41:00,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512713996] [2020-08-18 18:41:00,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 18:41:00,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 18:41:00,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:41:00,294 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 14 states. [2020-08-18 18:41:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:00,440 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-08-18 18:41:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:41:00,441 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-08-18 18:41:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:00,442 INFO L225 Difference]: With dead ends: 78 [2020-08-18 18:41:00,442 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 18:41:00,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:41:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 18:41:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-08-18 18:41:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 18:41:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-08-18 18:41:00,451 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2020-08-18 18:41:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:00,452 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-08-18 18:41:00,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 18:41:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-08-18 18:41:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 18:41:00,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:00,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:00,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:41:00,454 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:00,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-18 18:41:00,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:00,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135254897] [2020-08-18 18:41:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 18:41:00,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135254897] [2020-08-18 18:41:00,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:00,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 18:41:00,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492074653] [2020-08-18 18:41:00,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 18:41:00,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 18:41:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:41:00,870 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2020-08-18 18:41:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:01,043 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-08-18 18:41:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:41:01,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-18 18:41:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:01,045 INFO L225 Difference]: With dead ends: 66 [2020-08-18 18:41:01,045 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:41:01,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:41:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:41:01,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:41:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:41:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:41:01,048 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-08-18 18:41:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:01,051 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:41:01,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 18:41:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:41:01,051 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:41:01,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:41:01,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:41:01,080 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:41:01,080 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:41:01,080 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-18 18:41:01,080 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-18 18:41:01,080 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-18 18:41:01,080 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-18 18:41:01,081 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-18 18:41:01,081 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-18 18:41:01,081 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-18 18:41:01,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:41:01,081 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:41:01,081 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:41:01,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:41:01,082 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-18 18:41:01,082 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-18 18:41:01,082 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-18 18:41:01,082 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-18 18:41:01,082 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-18 18:41:01,082 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-18 18:41:01,082 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 18:41:01,083 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-18 18:41:01,083 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-18 18:41:01,083 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-18 18:41:01,083 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-18 18:41:01,084 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-18 18:41:01,084 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 18:41:01,084 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-18 18:41:01,084 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-18 18:41:01,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:41:01 BoogieIcfgContainer [2020-08-18 18:41:01,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:41:01,101 INFO L168 Benchmark]: Toolchain (without parser) took 4199.30 ms. Allocated memory was 136.8 MB in the beginning and 253.2 MB in the end (delta: 116.4 MB). Free memory was 99.8 MB in the beginning and 109.9 MB in the end (delta: -10.1 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,102 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.03 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 88.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,105 INFO L168 Benchmark]: Boogie Preprocessor took 120.28 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 88.7 MB in the beginning and 177.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,105 INFO L168 Benchmark]: RCFGBuilder took 291.18 ms. Allocated memory is still 198.7 MB. Free memory was 177.2 MB in the beginning and 164.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,108 INFO L168 Benchmark]: TraceAbstraction took 3480.20 ms. Allocated memory was 198.7 MB in the beginning and 253.2 MB in the end (delta: 54.5 MB). Free memory was 163.8 MB in the beginning and 109.9 MB in the end (delta: 53.9 MB). Peak memory consumption was 108.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,120 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.03 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 88.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.28 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 88.7 MB in the beginning and 177.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.18 ms. Allocated memory is still 198.7 MB. Free memory was 177.2 MB in the beginning and 164.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3480.20 ms. Allocated memory was 198.7 MB in the beginning and 253.2 MB in the end (delta: 54.5 MB). Free memory was 163.8 MB in the beginning and 109.9 MB in the end (delta: 53.9 MB). Peak memory consumption was 108.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 245 SDtfs, 32 SDslu, 1737 SDs, 0 SdLazy, 450 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 23450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 53/77 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...