/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/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 19:46:31,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:31,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:31,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:46:31,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:31,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:31,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:31,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:31,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:31,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:31,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:31,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:31,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:31,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:31,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:31,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:31,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:46:31,892 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 19:46:31,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:31,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:31,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:31,903 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:31,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:31,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:31,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:31,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:31,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:31,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:31,905 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:31,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:31,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:31,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:31,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:31,906 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:31,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:31,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:31,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:31,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:31,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:31,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:31,907 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:32,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:32,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:32,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:32,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:32,226 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:32,226 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-08-22 19:46:32,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/294bf0afa/63b67aee79514d86a1e87e5625eb6d33/FLAGbb76990f2 [2020-08-22 19:46:32,715 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:32,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-08-22 19:46:32,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/294bf0afa/63b67aee79514d86a1e87e5625eb6d33/FLAGbb76990f2 [2020-08-22 19:46:33,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/294bf0afa/63b67aee79514d86a1e87e5625eb6d33 [2020-08-22 19:46:33,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:33,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:33,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:33,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:33,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:33,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c2fc366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33, skipping insertion in model container [2020-08-22 19:46:33,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:33,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:33,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:33,374 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:33,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:33,409 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:33,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33 WrapperNode [2020-08-22 19:46:33,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:33,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:33,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:33,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:33,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (1/1) ... [2020-08-22 19:46:33,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:33,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:33,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:33,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:33,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (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 19:46:33,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:33,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:33,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:33,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:33,823 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:33,824 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:46:33,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:33 BoogieIcfgContainer [2020-08-22 19:46:33,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:33,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:33,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:33,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:33,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:33" (1/3) ... [2020-08-22 19:46:33,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d17f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:33, skipping insertion in model container [2020-08-22 19:46:33,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:33" (2/3) ... [2020-08-22 19:46:33,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d17f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:33, skipping insertion in model container [2020-08-22 19:46:33,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:33" (3/3) ... [2020-08-22 19:46:33,840 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-08-22 19:46:33,853 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:33,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:33,880 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:33,958 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:33,958 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:33,959 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:33,959 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:33,959 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:33,959 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:33,959 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:33,963 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-22 19:46:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 19:46:34,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:34,021 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,029 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-08-22 19:46:34,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449815985] [2020-08-22 19:46:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,118 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,192 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 19:46:34,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449815985] [2020-08-22 19:46:34,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:34,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:46:34,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445526524] [2020-08-22 19:46:34,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:46:34,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:34,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:46:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:46:34,226 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-08-22 19:46:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:34,254 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-08-22 19:46:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:46:34,255 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-08-22 19:46:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:34,265 INFO L225 Difference]: With dead ends: 33 [2020-08-22 19:46:34,266 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 19:46:34,270 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 19:46:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 19:46:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-22 19:46:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-22 19:46:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-22 19:46:34,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-08-22 19:46:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:34,315 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-22 19:46:34,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:46:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-22 19:46:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 19:46:34,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:34,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:34,317 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-08-22 19:46:34,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119389539] [2020-08-22 19:46:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,326 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,438 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 19:46:34,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119389539] [2020-08-22 19:46:34,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:34,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:46:34,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120193313] [2020-08-22 19:46:34,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:46:34,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:46:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:34,442 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-08-22 19:46:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:34,471 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-08-22 19:46:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:46:34,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-22 19:46:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:34,473 INFO L225 Difference]: With dead ends: 24 [2020-08-22 19:46:34,473 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 19:46:34,475 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 19:46:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 19:46:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-08-22 19:46:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 19:46:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 19:46:34,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-08-22 19:46:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:34,483 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 19:46:34,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:46:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 19:46:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 19:46:34,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:34,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:34,486 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-08-22 19:46:34,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437121765] [2020-08-22 19:46:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,509 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,637 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 19:46:34,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437121765] [2020-08-22 19:46:34,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:34,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:46:34,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867073598] [2020-08-22 19:46:34,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:46:34,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:34,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:46:34,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:46:34,640 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-08-22 19:46:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:34,724 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-22 19:46:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:46:34,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 19:46:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:34,726 INFO L225 Difference]: With dead ends: 29 [2020-08-22 19:46:34,726 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 19:46:34,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:46:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 19:46:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-08-22 19:46:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 19:46:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-08-22 19:46:34,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-08-22 19:46:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:34,737 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-08-22 19:46:34,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:46:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-08-22 19:46:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 19:46:34,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:34,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:34,739 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-08-22 19:46:34,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856870641] [2020-08-22 19:46:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,756 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,898 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 19:46:34,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856870641] [2020-08-22 19:46:34,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:34,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:46:34,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647440478] [2020-08-22 19:46:34,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:46:34,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:34,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:46:34,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:46:34,902 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-08-22 19:46:35,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:35,028 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-08-22 19:46:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:46:35,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-08-22 19:46:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:35,030 INFO L225 Difference]: With dead ends: 34 [2020-08-22 19:46:35,031 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 19:46:35,032 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 19:46:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 19:46:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-22 19:46:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 19:46:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-22 19:46:35,041 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-08-22 19:46:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:35,042 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-22 19:46:35,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:46:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-22 19:46:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:46:35,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:35,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:35,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:35,044 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-08-22 19:46:35,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:35,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694749191] [2020-08-22 19:46:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:35,051 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,262 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 19:46:35,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694749191] [2020-08-22 19:46:35,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:35,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:46:35,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938658250] [2020-08-22 19:46:35,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:46:35,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:35,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:46:35,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:46:35,265 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-08-22 19:46:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:35,441 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-08-22 19:46:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:46:35,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 19:46:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:35,443 INFO L225 Difference]: With dead ends: 39 [2020-08-22 19:46:35,443 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 19:46:35,444 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 19:46:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 19:46:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-22 19:46:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 19:46:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-08-22 19:46:35,453 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-08-22 19:46:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:35,453 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-08-22 19:46:35,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:46:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-08-22 19:46:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 19:46:35,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:35,455 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:35,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:46:35,455 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-08-22 19:46:35,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:35,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798486572] [2020-08-22 19:46:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:35,461 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,740 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 19:46:35,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798486572] [2020-08-22 19:46:35,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:35,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:46:35,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757917370] [2020-08-22 19:46:35,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:46:35,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:46:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:46:35,744 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-08-22 19:46:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:35,977 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-22 19:46:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:46:35,978 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-22 19:46:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:35,979 INFO L225 Difference]: With dead ends: 44 [2020-08-22 19:46:35,979 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 19:46:35,980 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 19:46:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 19:46:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 19:46:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 19:46:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-08-22 19:46:35,987 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-08-22 19:46:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:35,988 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-08-22 19:46:35,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:46:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-08-22 19:46:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 19:46:35,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:35,989 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:35,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:46:35,990 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-08-22 19:46:35,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:35,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787288612] [2020-08-22 19:46:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:35,995 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:36,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:36,245 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 19:46:36,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787288612] [2020-08-22 19:46:36,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:36,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:46:36,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359421455] [2020-08-22 19:46:36,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:46:36,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:36,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:46:36,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:46:36,250 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-08-22 19:46:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:36,593 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-08-22 19:46:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:46:36,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-22 19:46:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:36,595 INFO L225 Difference]: With dead ends: 49 [2020-08-22 19:46:36,595 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 19:46:36,596 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 19:46:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 19:46:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 19:46:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 19:46:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-08-22 19:46:36,611 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-08-22 19:46:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:36,613 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-08-22 19:46:36,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:46:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-08-22 19:46:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 19:46:36,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:36,617 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:36,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:46:36,617 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-08-22 19:46:36,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:36,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447268166] [2020-08-22 19:46:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:36,623 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:36,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,004 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 19:46:37,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447268166] [2020-08-22 19:46:37,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:37,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:46:37,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449276723] [2020-08-22 19:46:37,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:46:37,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:37,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:46:37,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:46:37,007 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 18 states. [2020-08-22 19:46:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:37,499 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-08-22 19:46:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 19:46:37,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-08-22 19:46:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:37,502 INFO L225 Difference]: With dead ends: 50 [2020-08-22 19:46:37,502 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:46:37,503 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 19:46:37,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:46:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:46:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:46:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:46:37,504 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-08-22 19:46:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:37,504 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:46:37,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:46:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:46:37,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:46:37,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:46:37,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:46:37,762 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-08-22 19:46:37,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:46:37,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:46:37,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:46:37,966 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:46:37,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:46:37,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:46:37,967 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-08-22 19:46:37,967 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 10 20) the Hoare annotation is: true [2020-08-22 19:46:37,967 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 19:46:37,967 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 19:46:37,967 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 19:46:37,968 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 19:46:37,968 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 10 20) the Hoare annotation is: true [2020-08-22 19:46:37,968 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 19:46:37,968 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 19:46:37,969 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 19:46:37,969 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 19:46:37,969 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-08-22 19:46:37,969 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:46:37,969 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 19:46:37,970 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:46:37,970 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-08-22 19:46:38,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:46:38 BoogieIcfgContainer [2020-08-22 19:46:38,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:46:38,013 INFO L168 Benchmark]: Toolchain (without parser) took 4844.18 ms. Allocated memory was 138.9 MB in the beginning and 245.4 MB in the end (delta: 106.4 MB). Free memory was 101.4 MB in the beginning and 132.1 MB in the end (delta: -30.7 MB). Peak memory consumption was 75.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:38,014 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:46:38,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.63 ms. Allocated memory is still 138.9 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:38,017 INFO L168 Benchmark]: Boogie Preprocessor took 134.41 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 91.9 MB in the beginning and 182.5 MB in the end (delta: -90.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:38,018 INFO L168 Benchmark]: RCFGBuilder took 283.22 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 170.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:38,022 INFO L168 Benchmark]: TraceAbstraction took 4175.23 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 170.7 MB in the beginning and 132.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:38,027 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.63 ms. Allocated memory is still 138.9 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.41 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 91.9 MB in the beginning and 182.5 MB in the end (delta: -90.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.22 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 170.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4175.23 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 170.7 MB in the beginning and 132.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 80.6 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: 1.5s, 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: No data available, 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...