/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-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:05:13,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:05:13,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:05:13,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:05:13,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:05:13,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:05:13,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:05:13,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:05:13,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:05:13,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:05:13,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:05:13,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:05:13,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:05:13,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:05:13,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:05:13,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:05:13,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:05:13,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:05:13,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:05:13,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:05:13,189 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 23:05:13,200 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:05:13,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:05:13,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:05:13,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:05:13,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:05:13,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:05:13,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:05:13,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:05:13,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:05:13,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:05:13,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:05:13,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:05:13,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:05:13,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:05:13,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:05:13,206 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:05:13,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:05:13,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:05:13,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:05:13,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:05:13,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:05:13,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:05:13,207 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 23:05:13,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:05:13,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:05:13,580 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:05:13,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:05:13,584 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:05:13,587 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-08-22 23:05:13,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a890c8c7/225a0ce27c8143b8aae0e7a56a32139b/FLAG2e5dedc33 [2020-08-22 23:05:14,260 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:05:14,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-08-22 23:05:14,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a890c8c7/225a0ce27c8143b8aae0e7a56a32139b/FLAG2e5dedc33 [2020-08-22 23:05:14,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a890c8c7/225a0ce27c8143b8aae0e7a56a32139b [2020-08-22 23:05:14,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:05:14,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:05:14,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:14,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:05:14,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:05:14,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2df2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14, skipping insertion in model container [2020-08-22 23:05:14,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:05:14,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:05:14,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:14,841 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:05:14,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:14,881 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:05:14,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14 WrapperNode [2020-08-22 23:05:14,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:14,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:05:14,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:05:14,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:05:14,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (1/1) ... [2020-08-22 23:05:14,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:05:14,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:05:14,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:05:14,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:05:14,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (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 23:05:15,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:05:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:05:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:05:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:05:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:05:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:05:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:05:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:05:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:05:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:05:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:05:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:05:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:05:15,347 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:05:15,347 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:05:15,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:15 BoogieIcfgContainer [2020-08-22 23:05:15,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:05:15,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:05:15,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:05:15,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:05:15,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:05:14" (1/3) ... [2020-08-22 23:05:15,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3cc254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:15, skipping insertion in model container [2020-08-22 23:05:15,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:14" (2/3) ... [2020-08-22 23:05:15,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3cc254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:15, skipping insertion in model container [2020-08-22 23:05:15,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:15" (3/3) ... [2020-08-22 23:05:15,364 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-08-22 23:05:15,378 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:05:15,401 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:05:15,455 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:05:15,532 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:05:15,532 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:05:15,533 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:05:15,533 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:05:15,533 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:05:15,534 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:05:15,534 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:05:15,534 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:05:15,561 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 23:05:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 23:05:15,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:15,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:15,576 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:15,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash 317967837, now seen corresponding path program 1 times [2020-08-22 23:05:15,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:15,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305233263] [2020-08-22 23:05:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,984 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 23:05:15,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305233263] [2020-08-22 23:05:15,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:15,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 23:05:15,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267883961] [2020-08-22 23:05:15,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:05:15,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:05:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:05:16,020 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 9 states. [2020-08-22 23:05:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:16,346 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-08-22 23:05:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:05:16,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-08-22 23:05:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:16,367 INFO L225 Difference]: With dead ends: 70 [2020-08-22 23:05:16,368 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 23:05:16,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:05:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 23:05:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-08-22 23:05:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 23:05:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-22 23:05:16,432 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-08-22 23:05:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:16,433 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-22 23:05:16,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:05:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-22 23:05:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 23:05:16,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:16,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:16,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:05:16,435 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash -628039010, now seen corresponding path program 1 times [2020-08-22 23:05:16,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:16,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160695644] [2020-08-22 23:05:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,844 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 23:05:16,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160695644] [2020-08-22 23:05:16,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:16,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:05:16,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205741436] [2020-08-22 23:05:16,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:05:16,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:16,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:05:16,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:05:16,868 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-08-22 23:05:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:17,294 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-08-22 23:05:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:05:17,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-08-22 23:05:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:17,297 INFO L225 Difference]: With dead ends: 53 [2020-08-22 23:05:17,297 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 23:05:17,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:05:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 23:05:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-08-22 23:05:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 23:05:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-08-22 23:05:17,311 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2020-08-22 23:05:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:17,311 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-08-22 23:05:17,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:05:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-08-22 23:05:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 23:05:17,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:17,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:17,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:05:17,314 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:17,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1791276066, now seen corresponding path program 1 times [2020-08-22 23:05:17,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:17,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25327939] [2020-08-22 23:05:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,637 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 23:05:17,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25327939] [2020-08-22 23:05:17,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:17,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:05:17,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650387458] [2020-08-22 23:05:17,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:05:17,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:17,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:05:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:05:17,641 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states. [2020-08-22 23:05:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:18,047 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-08-22 23:05:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:05:18,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-08-22 23:05:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:18,050 INFO L225 Difference]: With dead ends: 54 [2020-08-22 23:05:18,050 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 23:05:18,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:05:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 23:05:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-08-22 23:05:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 23:05:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-08-22 23:05:18,065 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2020-08-22 23:05:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:18,065 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-08-22 23:05:18,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:05:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-08-22 23:05:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 23:05:18,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:18,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:18,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:05:18,068 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1600642371, now seen corresponding path program 2 times [2020-08-22 23:05:18,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:18,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084384893] [2020-08-22 23:05:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 23:05:18,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084384893] [2020-08-22 23:05:18,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:18,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:05:18,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113883937] [2020-08-22 23:05:18,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:05:18,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:05:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:05:18,534 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 14 states. [2020-08-22 23:05:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:19,056 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-08-22 23:05:19,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:05:19,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-22 23:05:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:19,059 INFO L225 Difference]: With dead ends: 58 [2020-08-22 23:05:19,059 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 23:05:19,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:05:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 23:05:19,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-08-22 23:05:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 23:05:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-08-22 23:05:19,089 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 34 [2020-08-22 23:05:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:19,090 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-08-22 23:05:19,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:05:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-08-22 23:05:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 23:05:19,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:19,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:19,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:05:19,097 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1531087869, now seen corresponding path program 1 times [2020-08-22 23:05:19,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:19,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348641122] [2020-08-22 23:05:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:19,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 23:05:19,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348641122] [2020-08-22 23:05:19,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:19,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:05:19,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553542886] [2020-08-22 23:05:19,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:05:19,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:05:19,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:05:19,483 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 14 states. [2020-08-22 23:05:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:19,983 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-08-22 23:05:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:05:19,983 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-22 23:05:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:19,984 INFO L225 Difference]: With dead ends: 65 [2020-08-22 23:05:19,985 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 23:05:19,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:05:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 23:05:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-22 23:05:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:05:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-22 23:05:19,994 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 34 [2020-08-22 23:05:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:19,994 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-22 23:05:19,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:05:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-22 23:05:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 23:05:19,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:19,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:19,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:05:19,996 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash -966733443, now seen corresponding path program 2 times [2020-08-22 23:05:19,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:19,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62459270] [2020-08-22 23:05:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 23:05:20,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62459270] [2020-08-22 23:05:20,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:20,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:05:20,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267778772] [2020-08-22 23:05:20,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:05:20,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:20,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:05:20,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:05:20,279 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2020-08-22 23:05:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:20,863 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-08-22 23:05:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 23:05:20,866 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-22 23:05:20,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:20,870 INFO L225 Difference]: With dead ends: 85 [2020-08-22 23:05:20,871 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 23:05:20,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:05:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 23:05:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2020-08-22 23:05:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 23:05:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-08-22 23:05:20,895 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 34 [2020-08-22 23:05:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:20,896 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-08-22 23:05:20,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:05:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-08-22 23:05:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 23:05:20,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:20,900 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:20,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:05:20,905 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:20,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1509294206, now seen corresponding path program 3 times [2020-08-22 23:05:20,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:20,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157996833] [2020-08-22 23:05:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:21,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 23:05:21,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157996833] [2020-08-22 23:05:21,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:21,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:05:21,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369006557] [2020-08-22 23:05:21,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:05:21,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:21,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:05:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:05:21,275 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 15 states. [2020-08-22 23:05:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:21,799 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-08-22 23:05:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:05:21,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-08-22 23:05:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:21,801 INFO L225 Difference]: With dead ends: 63 [2020-08-22 23:05:21,801 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:05:21,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:05:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:05:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:05:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:05:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:05:21,804 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-08-22 23:05:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:21,804 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:05:21,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:05:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:05:21,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:05:21,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:05:21,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:05:22,288 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:22,288 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:22,289 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:22,289 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:05:22,289 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:05:22,289 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:22,290 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:22,291 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:22,292 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 23:05:22,292 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 23:05:22,292 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:22,292 INFO L271 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-08-22 23:05:22,293 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 29) the Hoare annotation is: true [2020-08-22 23:05:22,293 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse1 (+ (* 3 main_~i~0) 2)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 (* 3 main_~n~0)))) [2020-08-22 23:05:22,293 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 23:05:22,293 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 23:05:22,294 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 26) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-08-22 23:05:22,294 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~i~0)) [2020-08-22 23:05:22,295 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 26) the Hoare annotation is: (let ((.cse1 (* 3 main_~n~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 23:05:22,296 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (<= main_~a~0 0) (<= 0 main_~i~0) (<= (* 3 main_~i~0) main_~a~0)) [2020-08-22 23:05:22,297 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 29) the Hoare annotation is: true [2020-08-22 23:05:22,297 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 23:05:22,297 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 23:05:22,298 INFO L264 CegarLoopResult]: At program point L15-5(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 23:05:22,298 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 29) the Hoare annotation is: true [2020-08-22 23:05:22,299 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 23:05:22,299 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (+ (* 3 main_~i~0) 1))) (and (<= .cse0 .cse1) (<= (+ main_~a~0 main_~b~0 2) (* 3 main_~n~0)) (<= .cse1 .cse0))) [2020-08-22 23:05:22,299 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 23:05:22,300 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 24) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 23:05:22,300 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 23:05:22,300 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 23:05:22,300 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= main_~a~0 0) (<= .cse0 main_~a~0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 23:05:22,301 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 23:05:22,301 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 23:05:22,301 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-08-22 23:05:22,301 INFO L264 CegarLoopResult]: At program point L18-5(lines 18 24) the Hoare annotation is: (let ((.cse0 (+ (* 3 main_~i~0) 3)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 3 main_~n~0)))) [2020-08-22 23:05:22,302 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-08-22 23:05:22,303 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:22,303 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:05:22,303 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:22,303 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:05:22,305 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:05:22,305 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:22,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:05:22 BoogieIcfgContainer [2020-08-22 23:05:22,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:05:22,341 INFO L168 Benchmark]: Toolchain (without parser) took 7734.04 ms. Allocated memory was 136.3 MB in the beginning and 296.2 MB in the end (delta: 159.9 MB). Free memory was 100.6 MB in the beginning and 262.0 MB in the end (delta: -161.4 MB). Peak memory consumption was 169.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:22,349 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:05:22,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.91 ms. Allocated memory is still 136.3 MB. Free memory was 100.3 MB in the beginning and 90.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:22,352 INFO L168 Benchmark]: Boogie Preprocessor took 41.92 ms. Allocated memory is still 136.3 MB. Free memory was 90.9 MB in the beginning and 89.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:22,354 INFO L168 Benchmark]: RCFGBuilder took 427.39 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 89.4 MB in the beginning and 164.9 MB in the end (delta: -75.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:22,355 INFO L168 Benchmark]: TraceAbstraction took 6981.52 ms. Allocated memory was 200.3 MB in the beginning and 296.2 MB in the end (delta: 95.9 MB). Free memory was 164.9 MB in the beginning and 262.0 MB in the end (delta: -97.1 MB). Peak memory consumption was 170.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:22,371 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.91 ms. Allocated memory is still 136.3 MB. Free memory was 100.3 MB in the beginning and 90.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.92 ms. Allocated memory is still 136.3 MB. Free memory was 90.9 MB in the beginning and 89.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 427.39 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 89.4 MB in the beginning and 164.9 MB in the end (delta: -75.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6981.52 ms. Allocated memory was 200.3 MB in the beginning and 296.2 MB in the end (delta: 95.9 MB). Free memory was 164.9 MB in the beginning and 262.0 MB in the end (delta: -97.1 MB). Peak memory consumption was 170.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 17]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 172 SDtfs, 322 SDslu, 1116 SDs, 0 SdLazy, 935 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 86 PreInvPairs, 143 NumberOfFragments, 443 HoareAnnotationTreeSize, 86 FomulaSimplifications, 7566 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 38 FomulaSimplificationsInter, 93 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 71212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 9/41 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...