/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:18:19,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:18:19,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:18:19,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:18:19,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:18:19,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:18:19,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:18:19,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:18:19,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:18:19,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:18:19,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:18:19,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:18:19,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:18:19,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:18:19,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:18:19,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:18:19,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:18:19,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:18:19,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:18:19,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:18:19,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:18:19,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:18:19,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:18:19,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:18:19,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:18:19,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:18:19,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:18:19,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:18:19,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:18:19,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:18:19,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:18:19,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:18:19,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:18:19,714 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:18:19,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:18:19,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:18:19,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:18:19,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:18:19,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:18:19,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:18:19,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:18:19,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:18:19,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:18:19,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:18:19,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:18:19,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:18:19,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:18:19,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:18:19,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:18:19,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:18:19,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:18:19,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:18:19,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:18:19,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:18:19,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:18:19,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:18:19,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:18:19,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:18:19,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:18:20,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:18:20,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:18:20,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:18:20,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:18:20,056 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:18:20,057 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-22 16:18:20,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7a06d44/dec9c5f2d0b74ea6a7d0938d70377b62/FLAG6ce8524fc [2020-08-22 16:18:20,635 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:18:20,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-22 16:18:20,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7a06d44/dec9c5f2d0b74ea6a7d0938d70377b62/FLAG6ce8524fc [2020-08-22 16:18:21,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7a06d44/dec9c5f2d0b74ea6a7d0938d70377b62 [2020-08-22 16:18:21,040 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:18:21,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:18:21,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:18:21,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:18:21,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:18:21,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4839a71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21, skipping insertion in model container [2020-08-22 16:18:21,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:18:21,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:18:21,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:18:21,270 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:18:21,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:18:21,308 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:18:21,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21 WrapperNode [2020-08-22 16:18:21,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:18:21,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:18:21,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:18:21,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:18:21,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (1/1) ... [2020-08-22 16:18:21,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:18:21,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:18:21,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:18:21,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:18:21,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:18:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:18:21,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:18:21,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:18:21,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:18:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:18:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:18:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:18:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:18:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:18:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:18:21,760 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:18:21,761 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:18:21,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:21 BoogieIcfgContainer [2020-08-22 16:18:21,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:18:21,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:18:21,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:18:21,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:18:21,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:18:21" (1/3) ... [2020-08-22 16:18:21,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30cec658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:21, skipping insertion in model container [2020-08-22 16:18:21,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:21" (2/3) ... [2020-08-22 16:18:21,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30cec658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:21, skipping insertion in model container [2020-08-22 16:18:21,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:21" (3/3) ... [2020-08-22 16:18:21,773 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-08-22 16:18:21,784 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:18:21,792 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:18:21,806 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:18:21,830 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:18:21,830 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:18:21,830 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:18:21,830 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:18:21,831 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:18:21,831 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:18:21,831 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:18:21,831 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:18:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 16:18:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 16:18:21,852 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:21,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:21,854 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:21,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-08-22 16:18:21,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:21,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271754393] [2020-08-22 16:18:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:18:21,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271754393] [2020-08-22 16:18:21,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:21,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 16:18:21,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074943749] [2020-08-22 16:18:21,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 16:18:21,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:21,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 16:18:21,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:18:21,989 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-22 16:18:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:22,009 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-08-22 16:18:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 16:18:22,011 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 16:18:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:22,019 INFO L225 Difference]: With dead ends: 38 [2020-08-22 16:18:22,020 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:18:22,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:18:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:18:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 16:18:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:18:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-08-22 16:18:22,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-08-22 16:18:22,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:22,066 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-08-22 16:18:22,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 16:18:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-08-22 16:18:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 16:18:22,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:22,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:22,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:18:22,068 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:22,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-08-22 16:18:22,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:22,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307305367] [2020-08-22 16:18:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:18:22,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307305367] [2020-08-22 16:18:22,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:22,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:18:22,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118076056] [2020-08-22 16:18:22,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:18:22,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:22,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:18:22,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:18:22,244 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-08-22 16:18:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:22,339 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-08-22 16:18:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:18:22,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-22 16:18:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:22,342 INFO L225 Difference]: With dead ends: 28 [2020-08-22 16:18:22,343 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 16:18:22,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:18:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 16:18:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-22 16:18:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 16:18:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-08-22 16:18:22,351 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-08-22 16:18:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:22,351 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-08-22 16:18:22,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:18:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-08-22 16:18:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:18:22,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:22,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:22,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:18:22,353 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:22,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:22,354 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-08-22 16:18:22,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:22,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223346135] [2020-08-22 16:18:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:18:22,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223346135] [2020-08-22 16:18:22,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:22,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:18:22,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000303972] [2020-08-22 16:18:22,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:18:22,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:22,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:18:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:18:22,434 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 3 states. [2020-08-22 16:18:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:22,548 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2020-08-22 16:18:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:18:22,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:18:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:22,551 INFO L225 Difference]: With dead ends: 50 [2020-08-22 16:18:22,552 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 16:18:22,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:18:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 16:18:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 16:18:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:18:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-08-22 16:18:22,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-08-22 16:18:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:22,562 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-08-22 16:18:22,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:18:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-08-22 16:18:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:18:22,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:22,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:22,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:18:22,565 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:22,565 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-08-22 16:18:22,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:22,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596088814] [2020-08-22 16:18:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:18:22,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596088814] [2020-08-22 16:18:22,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455825143] [2020-08-22 16:18:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:18:22,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:18:23,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:23,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-08-22 16:18:23,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711134346] [2020-08-22 16:18:23,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:18:23,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:18:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:23,075 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 14 states. [2020-08-22 16:18:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:23,273 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-22 16:18:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:18:23,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-08-22 16:18:23,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:23,275 INFO L225 Difference]: With dead ends: 51 [2020-08-22 16:18:23,275 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 16:18:23,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 16:18:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-22 16:18:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 16:18:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-22 16:18:23,284 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-08-22 16:18:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:23,284 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-22 16:18:23,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:18:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-22 16:18:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:18:23,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:23,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:23,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:23,500 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:23,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-08-22 16:18:23,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:23,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051985683] [2020-08-22 16:18:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:18:23,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051985683] [2020-08-22 16:18:23,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:23,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:18:23,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596023828] [2020-08-22 16:18:23,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:18:23,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:23,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:18:23,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:18:23,552 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-08-22 16:18:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:23,617 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-08-22 16:18:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:18:23,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:18:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:23,619 INFO L225 Difference]: With dead ends: 61 [2020-08-22 16:18:23,619 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:18:23,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:18:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:18:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-22 16:18:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 16:18:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-08-22 16:18:23,627 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-08-22 16:18:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:23,627 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-08-22 16:18:23,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:18:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-08-22 16:18:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:18:23,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:23,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:23,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 16:18:23,629 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:23,629 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-08-22 16:18:23,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:23,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660025741] [2020-08-22 16:18:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:18:23,654 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:18:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:18:23,671 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:18:23,686 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:18:23,686 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:18:23,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:18:23,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:18:23 BoogieIcfgContainer [2020-08-22 16:18:23,716 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:18:23,720 INFO L168 Benchmark]: Toolchain (without parser) took 2676.67 ms. Allocated memory was 140.0 MB in the beginning and 235.4 MB in the end (delta: 95.4 MB). Free memory was 102.0 MB in the beginning and 158.8 MB in the end (delta: -56.8 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:23,721 INFO L168 Benchmark]: CDTParser took 1.28 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:18:23,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.84 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 91.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:23,723 INFO L168 Benchmark]: Boogie Preprocessor took 127.45 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.7 MB in the beginning and 179.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:23,724 INFO L168 Benchmark]: RCFGBuilder took 327.94 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 164.4 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:23,725 INFO L168 Benchmark]: TraceAbstraction took 1949.85 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 163.7 MB in the beginning and 158.8 MB in the end (delta: 4.9 MB). Peak memory consumption was 38.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:23,728 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.28 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.84 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 91.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.45 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.7 MB in the beginning and 179.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.94 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 164.4 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1949.85 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 163.7 MB in the beginning and 158.8 MB in the end (delta: 4.9 MB). Peak memory consumption was 38.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 VAL [x=0, y=1] [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 VAL [x=2, y=1] [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 VAL [x=0, y=1] [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 VAL [x=2, y=1] [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 VAL [x=0, y=1] [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 VAL [x=2, y=1] [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 VAL [x=4294967294, y=1] [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 VAL [x=2, y=1] [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 VAL [x=4, y=1] [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 VAL [x=0, y=1] [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 VAL [x=4294967292, y=1] [L15] COND FALSE !(x < 99) VAL [x=4294967292, y=1] [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) VAL [\old(cond)=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 129 SDtfs, 22 SDslu, 52 SDs, 0 SdLazy, 269 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, 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, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 5516 SizeOfPredicates, 1 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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 incorrect! Received shutdown request...