/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -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-c90d42b [2020-09-24 15:07:58,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:07:58,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:07:58,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:07:58,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:07:58,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:07:58,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:07:58,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:07:58,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:07:58,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:07:58,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:07:58,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:07:58,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:07:58,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:07:58,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:07:58,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:07:58,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:07:58,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:07:58,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:07:58,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:07:58,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:07:58,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:07:58,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:07:58,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:07:58,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:07:58,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:07:58,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:07:58,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:07:58,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 15:07:58,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:07:58,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:07:58,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:07:58,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:07:58,935 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:07:58,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:07:58,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:07:58,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:07:58,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:07:58,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:07:58,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:07:58,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:07:58,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:07:58,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:07:58,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:07:58,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:07:58,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:07:58,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:07:58,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:07:58,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:07:58,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:07:58,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:07:58,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:07:58,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:07:58,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:07:58,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:07:58,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:07:58,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:07:58,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:07:58,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:07:59,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:07:59,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:07:59,450 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:07:59,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:07:59,453 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:07:59,454 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-09-24 15:07:59,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef7af54d4/61d58dab8bbf4926abac0c3cd87011f8/FLAG947dbc35b [2020-09-24 15:08:00,102 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:08:00,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-09-24 15:08:00,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef7af54d4/61d58dab8bbf4926abac0c3cd87011f8/FLAG947dbc35b [2020-09-24 15:08:00,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef7af54d4/61d58dab8bbf4926abac0c3cd87011f8 [2020-09-24 15:08:00,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:08:00,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:08:00,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:08:00,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:08:00,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:08:00,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155d8a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00, skipping insertion in model container [2020-09-24 15:08:00,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:08:00,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:08:00,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:08:00,749 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:08:00,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:08:00,799 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:08:00,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00 WrapperNode [2020-09-24 15:08:00,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:08:00,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:08:00,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:08:00,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:08:00,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ... [2020-09-24 15:08:00,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:08:00,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:08:00,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:08:00,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:08:00,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:08:01,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:08:01,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:08:01,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:08:01,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:08:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:08:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:08:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:08:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:08:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:08:01,199 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:08:01,200 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:08:01,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:01 BoogieIcfgContainer [2020-09-24 15:08:01,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:08:01,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:08:01,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:08:01,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:08:01,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:08:00" (1/3) ... [2020-09-24 15:08:01,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3456644b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:01, skipping insertion in model container [2020-09-24 15:08:01,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (2/3) ... [2020-09-24 15:08:01,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3456644b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:01, skipping insertion in model container [2020-09-24 15:08:01,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:01" (3/3) ... [2020-09-24 15:08:01,215 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-09-24 15:08:01,226 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:08:01,237 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:08:01,260 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:08:01,291 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:08:01,292 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:08:01,292 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:08:01,292 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:08:01,292 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:08:01,292 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:08:01,293 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:08:01,293 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:08:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-24 15:08:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 15:08:01,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:01,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:01,326 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:01,334 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-24 15:08:01,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:01,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487407051] [2020-09-24 15:08:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:01,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:01,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487407051] [2020-09-24 15:08:01,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:01,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 15:08:01,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084473191] [2020-09-24 15:08:01,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 15:08:01,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 15:08:01,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:08:01,518 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-24 15:08:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:01,549 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-24 15:08:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 15:08:01,551 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-24 15:08:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:01,562 INFO L225 Difference]: With dead ends: 33 [2020-09-24 15:08:01,563 INFO L226 Difference]: Without dead ends: 16 [2020-09-24 15:08:01,567 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 [2020-09-24 15:08:01,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-24 15:08:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-24 15:08:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-24 15:08:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-24 15:08:01,626 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-24 15:08:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:01,627 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-24 15:08:01,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 15:08:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-24 15:08:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 15:08:01,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:01,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:01,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:08:01,629 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-24 15:08:01,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:01,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814815315] [2020-09-24 15:08:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:01,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:01,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814815315] [2020-09-24 15:08:01,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:01,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 15:08:01,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296697158] [2020-09-24 15:08:01,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 15:08:01,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 15:08:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 15:08:01,763 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-24 15:08:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:01,816 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-24 15:08:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 15:08:01,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-24 15:08:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:01,818 INFO L225 Difference]: With dead ends: 24 [2020-09-24 15:08:01,819 INFO L226 Difference]: Without dead ends: 19 [2020-09-24 15:08:01,820 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 [2020-09-24 15:08:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-24 15:08:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-24 15:08:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-24 15:08:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-24 15:08:01,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-24 15:08:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:01,828 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-24 15:08:01,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 15:08:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-24 15:08:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 15:08:01,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:01,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:01,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:08:01,848 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-24 15:08:01,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:01,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131351325] [2020-09-24 15:08:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:01,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:02,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131351325] [2020-09-24 15:08:02,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:02,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:08:02,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111577852] [2020-09-24 15:08:02,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:02,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:02,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:02,010 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-24 15:08:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:02,096 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-24 15:08:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:02,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 15:08:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:02,098 INFO L225 Difference]: With dead ends: 29 [2020-09-24 15:08:02,098 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 15:08:02,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:02,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 15:08:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-09-24 15:08:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 15:08:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 15:08:02,106 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 15:08:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:02,106 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 15:08:02,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 15:08:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 15:08:02,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:02,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:02,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:08:02,108 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-24 15:08:02,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:02,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85558656] [2020-09-24 15:08:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:02,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:02,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85558656] [2020-09-24 15:08:02,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:02,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:08:02,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294031675] [2020-09-24 15:08:02,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:02,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:02,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:02,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:02,311 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-24 15:08:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:02,426 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-24 15:08:02,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:02,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-24 15:08:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:02,429 INFO L225 Difference]: With dead ends: 34 [2020-09-24 15:08:02,429 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 15:08:02,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 15:08:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-24 15:08:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 15:08:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 15:08:02,437 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 15:08:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:02,438 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 15:08:02,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 15:08:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 15:08:02,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:02,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:02,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:08:02,440 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-24 15:08:02,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:02,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652298293] [2020-09-24 15:08:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:02,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:02,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652298293] [2020-09-24 15:08:02,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:02,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:08:02,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732389048] [2020-09-24 15:08:02,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:02,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:02,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:02,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:02,618 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-09-24 15:08:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:02,821 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-24 15:08:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:08:02,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-24 15:08:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:02,823 INFO L225 Difference]: With dead ends: 39 [2020-09-24 15:08:02,823 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 15:08:02,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:08:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 15:08:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-24 15:08:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 15:08:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 15:08:02,832 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 15:08:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:02,833 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 15:08:02,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 15:08:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 15:08:02,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:02,836 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:02,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:08:02,837 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-24 15:08:02,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:02,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888440643] [2020-09-24 15:08:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:03,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:03,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888440643] [2020-09-24 15:08:03,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:03,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:08:03,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074812132] [2020-09-24 15:08:03,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:03,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:03,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:03,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:03,050 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-09-24 15:08:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:03,285 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-09-24 15:08:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:08:03,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-09-24 15:08:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:03,287 INFO L225 Difference]: With dead ends: 44 [2020-09-24 15:08:03,287 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 15:08:03,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:08:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 15:08:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-24 15:08:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 15:08:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 15:08:03,295 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-24 15:08:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:03,295 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 15:08:03,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 15:08:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 15:08:03,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:03,297 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:03,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:08:03,297 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:03,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-24 15:08:03,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:03,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167951627] [2020-09-24 15:08:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:03,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:03,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167951627] [2020-09-24 15:08:03,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:03,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:08:03,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58069714] [2020-09-24 15:08:03,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:08:03,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:08:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:08:03,568 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-09-24 15:08:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:03,885 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-09-24 15:08:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 15:08:03,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-24 15:08:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:03,887 INFO L225 Difference]: With dead ends: 49 [2020-09-24 15:08:03,887 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 15:08:03,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:08:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 15:08:03,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 15:08:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 15:08:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 15:08:03,894 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-24 15:08:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:03,895 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 15:08:03,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:08:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 15:08:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 15:08:03,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:03,897 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:03,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:08:03,897 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-24 15:08:03,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:03,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001139786] [2020-09-24 15:08:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:04,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:04,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001139786] [2020-09-24 15:08:04,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:04,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 15:08:04,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085602555] [2020-09-24 15:08:04,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 15:08:04,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 15:08:04,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:04,354 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 18 states. [2020-09-24 15:08:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:04,850 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-09-24 15:08:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 15:08:04,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-09-24 15:08:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:04,851 INFO L225 Difference]: With dead ends: 50 [2020-09-24 15:08:04,851 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 15:08:04,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2020-09-24 15:08:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 15:08:04,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 15:08:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 15:08:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 15:08:04,853 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-09-24 15:08:04,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:04,854 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 15:08:04,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 15:08:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 15:08:04,854 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 15:08:04,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:08:04,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 15:08:04,959 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 15:08:04,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:08:04,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:08:04,960 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 15:08:04,960 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 15:08:04,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 15:08:04,960 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-09-24 15:08:04,961 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2020-09-24 15:08:04,961 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 15:08:04,961 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 15:08:04,961 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-09-24 15:08:04,961 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-09-24 15:08:04,961 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2020-09-24 15:08:04,962 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-24 15:08:04,962 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (let ((.cse1 (div main_~x~0 4294967296))) (or (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (<= main_~x~0 (+ .cse0 6)) (<= 0 .cse1))) (and (<= main_~x~0 5) (<= 5 main_~x~0)) (and (< 0 (+ .cse1 1)) (<= main_~x~0 4)))) [2020-09-24 15:08:04,962 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (<= main_~x~0 (+ .cse0 6)) (<= 0 .cse1)))) [2020-09-24 15:08:04,962 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-24 15:08:04,963 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-24 15:08:04,963 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 15:08:04,963 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-24 15:08:04,963 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-24 15:08:04,963 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-24 15:08:04,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:08:04 BoogieIcfgContainer [2020-09-24 15:08:04,986 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:08:04,990 INFO L168 Benchmark]: Toolchain (without parser) took 4520.03 ms. Allocated memory was 108.0 MB in the beginning and 218.1 MB in the end (delta: 110.1 MB). Free memory was 73.6 MB in the beginning and 162.5 MB in the end (delta: -88.9 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:04,991 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 108.0 MB. Free memory was 90.7 MB in the beginning and 90.6 MB in the end (delta: 104.9 kB). Peak memory consumption was 104.9 kB. Max. memory is 7.1 GB. [2020-09-24 15:08:04,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.32 ms. Allocated memory was 108.0 MB in the beginning and 123.2 MB in the end (delta: 15.2 MB). Free memory was 72.8 MB in the beginning and 100.8 MB in the end (delta: -27.9 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:04,993 INFO L168 Benchmark]: Boogie Preprocessor took 116.43 ms. Allocated memory was 123.2 MB in the beginning and 159.9 MB in the end (delta: 36.7 MB). Free memory was 100.8 MB in the beginning and 146.6 MB in the end (delta: -45.9 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:04,994 INFO L168 Benchmark]: RCFGBuilder took 287.02 ms. Allocated memory is still 159.9 MB. Free memory was 146.2 MB in the beginning and 135.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:04,995 INFO L168 Benchmark]: TraceAbstraction took 3780.22 ms. Allocated memory was 159.9 MB in the beginning and 218.1 MB in the end (delta: 58.2 MB). Free memory was 134.8 MB in the beginning and 162.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:05,000 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 108.0 MB. Free memory was 90.7 MB in the beginning and 90.6 MB in the end (delta: 104.9 kB). Peak memory consumption was 104.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.32 ms. Allocated memory was 108.0 MB in the beginning and 123.2 MB in the end (delta: 15.2 MB). Free memory was 72.8 MB in the beginning and 100.8 MB in the end (delta: -27.9 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.43 ms. Allocated memory was 123.2 MB in the beginning and 159.9 MB in the end (delta: 36.7 MB). Free memory was 100.8 MB in the beginning and 146.6 MB in the end (delta: -45.9 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 287.02 ms. Allocated memory is still 159.9 MB. Free memory was 146.2 MB in the beginning and 135.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3780.22 ms. Allocated memory was 159.9 MB in the beginning and 218.1 MB in the end (delta: 58.2 MB). Free memory was 134.8 MB in the beginning and 162.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 30.5 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: (((4294967296 * (x / 4294967296) + 5 < x && x <= 4294967296 * (x / 4294967296) + 6) && 0 <= x / 4294967296) || (x <= 5 && 5 <= x)) || (0 < x / 4294967296 + 1 && x <= 4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 136 SDtfs, 70 SDslu, 653 SDs, 0 SdLazy, 738 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 72 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 59 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 185 ConstructedInterpolants, 0 QuantifiedInterpolants, 31085 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/196 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...