/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:44:18,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:44:18,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:44:18,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:44:18,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:44:18,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:44:18,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:44:18,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:44:18,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:44:18,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:44:18,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:44:18,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:44:18,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:44:18,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:44:18,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:44:18,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:44:18,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:44:18,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:44:18,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:44:18,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:44:18,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:44:18,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:44:18,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:44:18,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:44:18,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:44:18,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:44:18,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:44:18,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:44:18,656 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 [2020-07-21 01:44:18,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:44:18,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:44:18,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:44:18,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:44:18,674 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:44:18,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:44:18,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:44:18,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:44:18,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:44:18,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:44:18,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:44:18,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:44:18,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:44:18,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:44:18,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:44:18,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:44:18,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:44:18,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:44:18,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:44:18,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:44:18,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:44:18,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:44:18,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:44:18,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:44:18,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:44:18,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:44:18,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:18,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:44:18,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:44:18,680 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:44:19,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:44:19,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:44:19,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:44:19,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:44:19,036 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:44:19,037 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-21 01:44:19,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e84ccfc5/7308e3f12e1b44ae8b11ebefce3d7fca/FLAG617bfdb22 [2020-07-21 01:44:19,722 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:44:19,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-21 01:44:19,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e84ccfc5/7308e3f12e1b44ae8b11ebefce3d7fca/FLAG617bfdb22 [2020-07-21 01:44:20,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e84ccfc5/7308e3f12e1b44ae8b11ebefce3d7fca [2020-07-21 01:44:20,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:44:20,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:44:20,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:44:20,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:44:20,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:44:20,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@412e4f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20, skipping insertion in model container [2020-07-21 01:44:20,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:44:20,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:44:20,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:44:20,302 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:44:20,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:44:20,343 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:44:20,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20 WrapperNode [2020-07-21 01:44:20,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:44:20,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:44:20,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:44:20,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:44:20,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (1/1) ... [2020-07-21 01:44:20,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:44:20,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:44:20,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:44:20,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:44:20,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (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 [2020-07-21 01:44:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:44:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:44:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:44:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:44:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:44:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:44:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:44:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:44:20,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:44:20,728 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:44:20,728 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:44:20,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:44:20 BoogieIcfgContainer [2020-07-21 01:44:20,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:44:20,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:44:20,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:44:20,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:44:20,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:44:20" (1/3) ... [2020-07-21 01:44:20,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e350585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:44:20, skipping insertion in model container [2020-07-21 01:44:20,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:44:20" (2/3) ... [2020-07-21 01:44:20,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e350585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:44:20, skipping insertion in model container [2020-07-21 01:44:20,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:44:20" (3/3) ... [2020-07-21 01:44:20,743 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-07-21 01:44:20,754 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:44:20,762 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:44:20,779 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:44:20,809 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:44:20,809 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:44:20,810 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:44:20,810 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:44:20,811 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:44:20,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:44:20,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:44:20,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:44:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 01:44:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:44:20,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:44:20,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:44:20,840 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:44:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:44:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-21 01:44:20,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:44:20,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612440857] [2020-07-21 01:44:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:20,944 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:44:20,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:44:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:44:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:44:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:21,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:44:21,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612440857] [2020-07-21 01:44:21,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:44:21,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:44:21,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392196082] [2020-07-21 01:44:21,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:44:21,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:44:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:44:21,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:44:21,086 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-21 01:44:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:44:21,127 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 01:44:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:44:21,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 01:44:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:44:21,140 INFO L225 Difference]: With dead ends: 29 [2020-07-21 01:44:21,140 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 01:44:21,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:44:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 01:44:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 01:44:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 01:44:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 01:44:21,194 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 01:44:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:44:21,194 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 01:44:21,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:44:21,195 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 01:44:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:44:21,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:44:21,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:44:21,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:21,411 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:44:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:44:21,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-21 01:44:21,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:44:21,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805030323] [2020-07-21 01:44:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:21,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:44:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:44:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:44:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:44:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:21,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:44:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:21,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805030323] [2020-07-21 01:44:21,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:44:21,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 01:44:21,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794013957] [2020-07-21 01:44:21,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:44:21,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:44:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:44:21,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:44:21,546 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-21 01:44:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:44:21,625 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 01:44:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:44:21,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 01:44:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:44:21,627 INFO L225 Difference]: With dead ends: 20 [2020-07-21 01:44:21,627 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 01:44:21,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:44:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 01:44:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 01:44:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 01:44:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 01:44:21,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-21 01:44:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:44:21,635 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 01:44:21,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:44:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 01:44:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:44:21,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:44:21,636 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:44:21,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:21,837 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:44:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:44:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-21 01:44:21,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:44:21,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595587287] [2020-07-21 01:44:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:21,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:44:21,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:44:21,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:44:21,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:44:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:21,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:44:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:22,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595587287] [2020-07-21 01:44:22,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:44:22,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 01:44:22,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709992556] [2020-07-21 01:44:22,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:44:22,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:44:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:44:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:44:22,091 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 01:44:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:44:22,158 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-21 01:44:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:44:22,158 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 01:44:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:44:22,159 INFO L225 Difference]: With dead ends: 22 [2020-07-21 01:44:22,159 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 01:44:22,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:44:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 01:44:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 01:44:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 01:44:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 01:44:22,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-21 01:44:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:44:22,167 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 01:44:22,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 01:44:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 01:44:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:44:22,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:44:22,168 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:44:22,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:22,382 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:44:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:44:22,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2020-07-21 01:44:22,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:44:22,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556693000] [2020-07-21 01:44:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:22,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:44:22,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:44:22,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 01:44:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:44:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:22,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:44:22,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:44:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:22,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556693000] [2020-07-21 01:44:22,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:44:22,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2020-07-21 01:44:22,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115149304] [2020-07-21 01:44:22,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 01:44:22,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:44:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 01:44:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-21 01:44:22,951 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2020-07-21 01:44:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:44:23,075 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-21 01:44:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:44:23,075 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2020-07-21 01:44:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:44:23,076 INFO L225 Difference]: With dead ends: 21 [2020-07-21 01:44:23,076 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:44:23,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-07-21 01:44:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:44:23,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:44:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:44:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:44:23,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-21 01:44:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:44:23,078 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:44:23,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 01:44:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:44:23,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:44:23,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:23,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:44:23,463 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:44:23,463 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:44:23,463 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:44:23,463 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:44:23,464 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:44:23,464 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:44:23,464 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-07-21 01:44:23,464 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2020-07-21 01:44:23,464 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2020-07-21 01:44:23,465 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (= 4 main_~x~0) (= 1 main_~x~0) (= 6 main_~x~0) (= 5 main_~x~0) (= 0 main_~x~0) (= 2 main_~x~0) (= 3 main_~x~0)) [2020-07-21 01:44:23,465 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (= 6 main_~x~0) [2020-07-21 01:44:23,465 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 01:44:23,465 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 01:44:23,465 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 01:44:23,466 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 01:44:23,467 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 01:44:23,467 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 01:44:23,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:44:23 BoogieIcfgContainer [2020-07-21 01:44:23,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:44:23,507 INFO L168 Benchmark]: Toolchain (without parser) took 3438.68 ms. Allocated memory was 144.2 MB in the beginning and 232.3 MB in the end (delta: 88.1 MB). Free memory was 100.9 MB in the beginning and 154.4 MB in the end (delta: -53.5 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:44:23,511 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 01:44:23,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.48 ms. Allocated memory is still 144.2 MB. Free memory was 100.5 MB in the beginning and 91.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:44:23,520 INFO L168 Benchmark]: Boogie Preprocessor took 32.95 ms. Allocated memory is still 144.2 MB. Free memory was 91.2 MB in the beginning and 89.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:44:23,522 INFO L168 Benchmark]: RCFGBuilder took 354.63 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 89.8 MB in the beginning and 169.8 MB in the end (delta: -80.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:44:23,524 INFO L168 Benchmark]: TraceAbstraction took 2765.53 ms. Allocated memory was 201.3 MB in the beginning and 232.3 MB in the end (delta: 30.9 MB). Free memory was 169.2 MB in the beginning and 154.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:44:23,541 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.48 ms. Allocated memory is still 144.2 MB. Free memory was 100.5 MB in the beginning and 91.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.95 ms. Allocated memory is still 144.2 MB. Free memory was 91.2 MB in the beginning and 89.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.63 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 89.8 MB in the beginning and 169.8 MB in the end (delta: -80.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2765.53 ms. Allocated memory was 201.3 MB in the beginning and 232.3 MB in the end (delta: 30.9 MB). Free memory was 169.2 MB in the beginning and 154.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((4 == x || 1 == x) || 6 == x) || 5 == x) || 0 == x) || 2 == x) || 3 == x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 2 SDslu, 160 SDs, 0 SdLazy, 152 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 19 NumberOfFragments, 30 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 51 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 3551 SizeOfPredicates, 5 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/64 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...