/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:02:20,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:02:20,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:02:20,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:02:20,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:02:20,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:02:20,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:02:20,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:02:20,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:02:20,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:02:20,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:02:20,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:02:20,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:02:20,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:02:20,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:02:20,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:02:20,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:02:20,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:02:20,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:02:20,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:02:20,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:02:20,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:02:20,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:02:20,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:02:20,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:02:20,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:02:20,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:02:20,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:02:20,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:02:20,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:02:20,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:02:20,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:02:20,607 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:02:20,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:02:20,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:02:20,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:02:20,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:02:20,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:02:20,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:02:20,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:02:20,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:02:20,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:02:20,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:02:20,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:02:20,611 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:02:20,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:02:20,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:02:20,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:02:20,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:02:20,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:02:20,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:02:20,612 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 23:02:20,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:02:20,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:02:20,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:02:20,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:02:20,988 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:02:20,989 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-08-22 23:02:21,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfb867219/ef73ac2437014357880bcef01962732f/FLAG72eb6284a [2020-08-22 23:02:21,480 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:02:21,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-08-22 23:02:21,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfb867219/ef73ac2437014357880bcef01962732f/FLAG72eb6284a [2020-08-22 23:02:21,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfb867219/ef73ac2437014357880bcef01962732f [2020-08-22 23:02:21,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:02:21,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:02:21,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:02:21,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:02:21,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:02:21,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:02:21" (1/1) ... [2020-08-22 23:02:21,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd39e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:21, skipping insertion in model container [2020-08-22 23:02:21,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:02:21" (1/1) ... [2020-08-22 23:02:21,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:02:21,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:02:22,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:02:22,129 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:02:22,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:02:22,162 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:02:22,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22 WrapperNode [2020-08-22 23:02:22,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:02:22,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:02:22,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:02:22,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:02:22,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (1/1) ... [2020-08-22 23:02:22,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (1/1) ... [2020-08-22 23:02:22,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (1/1) ... [2020-08-22 23:02:22,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (1/1) ... [2020-08-22 23:02:22,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (1/1) ... [2020-08-22 23:02:22,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (1/1) ... [2020-08-22 23:02:22,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (1/1) ... [2020-08-22 23:02:22,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:02:22,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:02:22,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:02:22,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:02:22,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:02:22,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:02:22,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:02:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:02:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:02:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:02:22,512 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:02:22,512 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:02:22,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:02:22 BoogieIcfgContainer [2020-08-22 23:02:22,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:02:22,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:02:22,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:02:22,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:02:22,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:02:21" (1/3) ... [2020-08-22 23:02:22,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d45578f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:02:22, skipping insertion in model container [2020-08-22 23:02:22,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:22" (2/3) ... [2020-08-22 23:02:22,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d45578f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:02:22, skipping insertion in model container [2020-08-22 23:02:22,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:02:22" (3/3) ... [2020-08-22 23:02:22,525 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-08-22 23:02:22,537 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:02:22,545 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:02:22,562 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:02:22,588 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:02:22,589 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:02:22,589 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:02:22,589 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:02:22,589 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:02:22,589 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:02:22,589 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:02:22,590 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:02:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-22 23:02:22,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 23:02:22,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:22,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:22,628 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-08-22 23:02:22,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:22,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110362530] [2020-08-22 23:02:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:22,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:22,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110362530] [2020-08-22 23:02:22,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:22,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:02:22,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543840903] [2020-08-22 23:02:22,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:02:22,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:22,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:02:22,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:02:22,809 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-08-22 23:02:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:22,832 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-08-22 23:02:22,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:02:22,833 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-08-22 23:02:22,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:22,840 INFO L225 Difference]: With dead ends: 33 [2020-08-22 23:02:22,840 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 23:02:22,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:02:22,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 23:02:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-22 23:02:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-22 23:02:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-22 23:02:22,880 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-08-22 23:02:22,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:22,881 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-22 23:02:22,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:02:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-22 23:02:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 23:02:22,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:22,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:22,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:02:22,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-08-22 23:02:22,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:22,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733314482] [2020-08-22 23:02:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:23,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733314482] [2020-08-22 23:02:23,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:23,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:02:23,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978561014] [2020-08-22 23:02:23,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:02:23,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:23,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:02:23,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:02:23,035 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-08-22 23:02:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:23,069 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-08-22 23:02:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:02:23,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-22 23:02:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:23,071 INFO L225 Difference]: With dead ends: 24 [2020-08-22 23:02:23,071 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 23:02:23,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:02:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 23:02:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-08-22 23:02:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 23:02:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 23:02:23,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-08-22 23:02:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:23,080 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 23:02:23,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:02:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 23:02:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 23:02:23,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:23,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:23,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:02:23,082 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:23,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-08-22 23:02:23,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:23,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769361691] [2020-08-22 23:02:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:23,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769361691] [2020-08-22 23:02:23,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:23,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:02:23,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338206190] [2020-08-22 23:02:23,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:02:23,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:02:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:02:23,224 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-08-22 23:02:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:23,305 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-22 23:02:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:02:23,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 23:02:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:23,307 INFO L225 Difference]: With dead ends: 29 [2020-08-22 23:02:23,308 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 23:02:23,309 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 [2020-08-22 23:02:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 23:02:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-08-22 23:02:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 23:02:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-08-22 23:02:23,317 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-08-22 23:02:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:23,318 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-08-22 23:02:23,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:02:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-08-22 23:02:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 23:02:23,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:23,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:23,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:02:23,321 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-08-22 23:02:23,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:23,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185610265] [2020-08-22 23:02:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:23,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185610265] [2020-08-22 23:02:23,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:23,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:02:23,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899861532] [2020-08-22 23:02:23,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:02:23,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:02:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:02:23,477 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-08-22 23:02:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:23,605 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-08-22 23:02:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:02:23,605 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-08-22 23:02:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:23,607 INFO L225 Difference]: With dead ends: 34 [2020-08-22 23:02:23,607 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 23:02:23,608 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 [2020-08-22 23:02:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 23:02:23,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-22 23:02:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 23:02:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-22 23:02:23,618 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-08-22 23:02:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:23,619 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-22 23:02:23,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:02:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-22 23:02:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 23:02:23,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:23,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:23,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:02:23,621 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:23,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-08-22 23:02:23,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:23,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905165166] [2020-08-22 23:02:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:23,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905165166] [2020-08-22 23:02:23,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:23,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:02:23,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955830645] [2020-08-22 23:02:23,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:02:23,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:02:23,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:02:23,878 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-08-22 23:02:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:24,102 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-08-22 23:02:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:02:24,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 23:02:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:24,104 INFO L225 Difference]: With dead ends: 39 [2020-08-22 23:02:24,104 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 23:02:24,105 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 [2020-08-22 23:02:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 23:02:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-22 23:02:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 23:02:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-08-22 23:02:24,113 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-08-22 23:02:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:24,113 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-08-22 23:02:24,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:02:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-08-22 23:02:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 23:02:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:24,115 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:24,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:02:24,115 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:24,116 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-08-22 23:02:24,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:24,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304956871] [2020-08-22 23:02:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:24,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:24,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304956871] [2020-08-22 23:02:24,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:24,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:02:24,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168481443] [2020-08-22 23:02:24,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:02:24,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:24,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:02:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:02:24,298 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-08-22 23:02:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:24,548 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-22 23:02:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:02:24,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-22 23:02:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:24,552 INFO L225 Difference]: With dead ends: 44 [2020-08-22 23:02:24,552 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 23:02:24,555 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 [2020-08-22 23:02:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 23:02:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 23:02:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 23:02:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-08-22 23:02:24,577 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-08-22 23:02:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:24,577 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-08-22 23:02:24,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:02:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-08-22 23:02:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 23:02:24,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:24,583 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:24,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:02:24,584 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:24,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-08-22 23:02:24,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:24,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628451180] [2020-08-22 23:02:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:24,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:24,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628451180] [2020-08-22 23:02:24,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:24,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:02:24,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313835017] [2020-08-22 23:02:24,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:02:24,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:02:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:02:24,891 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-08-22 23:02:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:25,210 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-08-22 23:02:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:02:25,210 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-22 23:02:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:25,212 INFO L225 Difference]: With dead ends: 49 [2020-08-22 23:02:25,212 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 23:02:25,213 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 [2020-08-22 23:02:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 23:02:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 23:02:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:02:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-08-22 23:02:25,222 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-08-22 23:02:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:25,222 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-08-22 23:02:25,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:02:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-08-22 23:02:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 23:02:25,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:25,224 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:25,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:02:25,224 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-08-22 23:02:25,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:25,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853537437] [2020-08-22 23:02:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:25,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:25,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853537437] [2020-08-22 23:02:25,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:25,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:02:25,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862882283] [2020-08-22 23:02:25,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:02:25,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:02:25,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:02:25,643 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 18 states. [2020-08-22 23:02:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:26,142 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-08-22 23:02:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 23:02:26,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-08-22 23:02:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:26,143 INFO L225 Difference]: With dead ends: 50 [2020-08-22 23:02:26,143 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:02:26,145 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 [2020-08-22 23:02:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:02:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:02:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:02:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:02:26,146 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-08-22 23:02:26,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:26,146 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:02:26,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:02:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:02:26,147 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:02:26,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:02:26,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:02:26,400 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-08-22 23:02:26,590 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:02:26,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:02:26,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:02:26,591 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:02:26,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:02:26,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:02:26,591 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-08-22 23:02:26,591 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 10 20) the Hoare annotation is: true [2020-08-22 23:02:26,592 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (and (<= 2 main_~x~0) (<= main_~x~0 2)) (and (<= 1 main_~x~0) (<= main_~x~0 1)) (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (<= main_~x~0 (+ .cse0 6)) (<= 0 .cse1)))) (and (<= main_~x~0 3) (<= 3 main_~x~0)) (and (<= main_~x~0 5) (<= 5 main_~x~0))) [2020-08-22 23:02:26,592 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (and (<= 2 main_~x~0) (<= main_~x~0 2)) (and (<= 1 main_~x~0) (<= main_~x~0 1)) (and (<= main_~x~0 3) (<= 3 main_~x~0)) (and (<= main_~x~0 5) (<= 5 main_~x~0)) (and (<= 0 main_~x~0) (<= main_~x~0 0))) [2020-08-22 23:02:26,593 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= |main_#t~post0| 4) (<= 4 |main_#t~post0|) (<= main_~x~0 4)) (and (<= 2 main_~x~0) (<= |main_#t~post0| 2) (<= main_~x~0 2) (<= 2 |main_#t~post0|)) (and (<= 5 |main_#t~post0|) (<= main_~x~0 5) (<= 5 main_~x~0) (<= |main_#t~post0| 5)) (and (<= |main_#t~post0| 1) (<= 1 main_~x~0) (<= main_~x~0 1) (<= 1 |main_#t~post0|)) (and (<= main_~x~0 3) (<= 3 main_~x~0) (<= 3 |main_#t~post0|) (<= |main_#t~post0| 3)) (and (<= |main_#t~post0| 0) (<= 0 main_~x~0) (<= 0 |main_#t~post0|) (<= main_~x~0 0))) [2020-08-22 23:02:26,593 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (or (and (<= |main_#t~post0| 2) (<= main_~x~0 3) (<= 3 main_~x~0) (<= 2 |main_#t~post0|)) (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (<= 5 |main_#t~post0|) (<= main_~x~0 (+ .cse0 6)) (<= |main_#t~post0| 5) (<= 0 .cse1)))) (and (<= |main_#t~post0| 4) (<= 4 |main_#t~post0|) (<= main_~x~0 5) (<= 5 main_~x~0)) (and (<= 2 main_~x~0) (<= |main_#t~post0| 1) (<= main_~x~0 2) (<= 1 |main_#t~post0|)) (and (<= 1 main_~x~0) (<= |main_#t~post0| 0) (<= 0 |main_#t~post0|) (<= main_~x~0 1)) (and (<= 4 main_~x~0) (<= main_~x~0 4) (<= 3 |main_#t~post0|) (<= |main_#t~post0| 3))) [2020-08-22 23:02:26,593 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 10 20) the Hoare annotation is: true [2020-08-22 23:02:26,594 INFO L264 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 0)) [2020-08-22 23:02:26,594 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)))) [2020-08-22 23:02:26,594 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)))) [2020-08-22 23:02:26,594 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 23:02:26,594 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-08-22 23:02:26,595 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:02:26,595 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:02:26,595 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:02:26,595 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-08-22 23:02:26,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:02:26 BoogieIcfgContainer [2020-08-22 23:02:26,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:02:26,619 INFO L168 Benchmark]: Toolchain (without parser) took 4739.82 ms. Allocated memory was 140.5 MB in the beginning and 244.8 MB in the end (delta: 104.3 MB). Free memory was 104.8 MB in the beginning and 126.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 82.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:26,621 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:02:26,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.94 ms. Allocated memory is still 140.5 MB. Free memory was 104.6 MB in the beginning and 95.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:26,623 INFO L168 Benchmark]: Boogie Preprocessor took 111.80 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 95.3 MB in the beginning and 182.6 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:26,623 INFO L168 Benchmark]: RCFGBuilder took 241.32 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:26,624 INFO L168 Benchmark]: TraceAbstraction took 4099.46 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 170.0 MB in the beginning and 126.3 MB in the end (delta: 43.7 MB). Peak memory consumption was 85.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:26,629 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.94 ms. Allocated memory is still 140.5 MB. Free memory was 104.6 MB in the beginning and 95.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.80 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 95.3 MB in the beginning and 182.6 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.32 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4099.46 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 170.0 MB in the beginning and 126.3 MB in the end (delta: 43.7 MB). Peak memory consumption was 85.2 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) - ProcedureContractResult [Line: 10]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - 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: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 136 SDtfs, 70 SDslu, 658 SDs, 0 SdLazy, 739 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, 22 LocationsWithAnnotation, 70 PreInvPairs, 122 NumberOfFragments, 378 HoareAnnotationTreeSize, 70 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 134 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s 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...