/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/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:05:31,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:05:31,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:05:31,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:05:31,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:05:31,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:05:31,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:05:31,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:05:31,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:05:31,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:05:31,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:05:31,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:05:31,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:05:31,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:05:31,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:05:31,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:05:31,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:05:31,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:05:31,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:05:31,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:05:31,087 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 23:05:31,098 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:05:31,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:05:31,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:05:31,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:05:31,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:05:31,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:05:31,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:05:31,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:05:31,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:05:31,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:05:31,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:05:31,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:05:31,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:05:31,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:05:31,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:05:31,102 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:05:31,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:05:31,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:05:31,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:05:31,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:05:31,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:05:31,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:05:31,104 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 23:05:31,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:05:31,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:05:31,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:05:31,472 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:05:31,473 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:05:31,475 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-08-22 23:05:31,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618e2f266/821f0d8260314891b0c0a24dace49425/FLAGde5ebc299 [2020-08-22 23:05:32,044 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:05:32,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-08-22 23:05:32,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618e2f266/821f0d8260314891b0c0a24dace49425/FLAGde5ebc299 [2020-08-22 23:05:32,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618e2f266/821f0d8260314891b0c0a24dace49425 [2020-08-22 23:05:32,415 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:05:32,417 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:05:32,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:32,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:05:32,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:05:32,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad8cc54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32, skipping insertion in model container [2020-08-22 23:05:32,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:05:32,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:05:32,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:32,703 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:05:32,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:32,750 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:05:32,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32 WrapperNode [2020-08-22 23:05:32,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:32,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:05:32,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:05:32,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:05:32,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (1/1) ... [2020-08-22 23:05:32,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:05:32,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:05:32,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:05:32,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:05:32,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (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 23:05:32,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:05:32,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:05:32,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:05:32,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:05:32,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:05:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:05:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:05:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:05:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:05:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:05:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:05:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:05:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:05:33,221 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:05:33,221 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:05:33,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:33 BoogieIcfgContainer [2020-08-22 23:05:33,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:05:33,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:05:33,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:05:33,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:05:33,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:05:32" (1/3) ... [2020-08-22 23:05:33,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ffd72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:33, skipping insertion in model container [2020-08-22 23:05:33,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:32" (2/3) ... [2020-08-22 23:05:33,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ffd72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:33, skipping insertion in model container [2020-08-22 23:05:33,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:33" (3/3) ... [2020-08-22 23:05:33,258 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-08-22 23:05:33,288 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:05:33,297 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:05:33,313 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:05:33,339 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:05:33,339 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:05:33,339 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:05:33,339 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:05:33,340 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:05:33,340 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:05:33,340 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:05:33,341 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:05:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 23:05:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 23:05:33,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:33,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:33,373 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:33,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2104509233, now seen corresponding path program 1 times [2020-08-22 23:05:33,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:33,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503030980] [2020-08-22 23:05:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,507 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 23:05:33,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503030980] [2020-08-22 23:05:33,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:33,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:05:33,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571639910] [2020-08-22 23:05:33,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:05:33,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:05:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:33,534 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-08-22 23:05:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:33,566 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-22 23:05:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:05:33,567 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-08-22 23:05:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:33,574 INFO L225 Difference]: With dead ends: 41 [2020-08-22 23:05:33,574 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 23:05:33,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 23:05:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 23:05:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 23:05:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-08-22 23:05:33,622 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-08-22 23:05:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:33,622 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-08-22 23:05:33,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:05:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-08-22 23:05:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 23:05:33,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:33,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:33,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:05:33,625 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2097121065, now seen corresponding path program 1 times [2020-08-22 23:05:33,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:33,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583511296] [2020-08-22 23:05:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,687 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 23:05:33,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583511296] [2020-08-22 23:05:33,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:33,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:05:33,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709387822] [2020-08-22 23:05:33,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:05:33,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:33,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:05:33,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:05:33,692 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 3 states. [2020-08-22 23:05:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:33,730 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-08-22 23:05:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:05:33,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 23:05:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:33,732 INFO L225 Difference]: With dead ends: 28 [2020-08-22 23:05:33,732 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 23:05:33,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:05:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 23:05:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-22 23:05:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 23:05:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-08-22 23:05:33,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-08-22 23:05:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:33,742 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-08-22 23:05:33,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:05:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-08-22 23:05:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 23:05:33,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:33,743 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] [2020-08-22 23:05:33,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:05:33,744 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:33,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:33,744 INFO L82 PathProgramCache]: Analyzing trace with hash -588245929, now seen corresponding path program 1 times [2020-08-22 23:05:33,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:33,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894091688] [2020-08-22 23:05:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,916 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 23:05:33,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894091688] [2020-08-22 23:05:33,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:33,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:05:33,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913833852] [2020-08-22 23:05:33,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:05:33,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:33,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:05:33,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:05:33,920 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2020-08-22 23:05:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:34,080 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-08-22 23:05:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:05:34,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-08-22 23:05:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:34,082 INFO L225 Difference]: With dead ends: 33 [2020-08-22 23:05:34,082 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 23:05:34,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:05:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 23:05:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-22 23:05:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 23:05:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-22 23:05:34,093 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-08-22 23:05:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:34,093 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-22 23:05:34,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:05:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-22 23:05:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 23:05:34,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:34,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:34,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:05:34,096 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:34,096 INFO L82 PathProgramCache]: Analyzing trace with hash -590441495, now seen corresponding path program 2 times [2020-08-22 23:05:34,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:34,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258994461] [2020-08-22 23:05:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:34,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:34,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258994461] [2020-08-22 23:05:34,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:34,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:05:34,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822504240] [2020-08-22 23:05:34,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:05:34,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:34,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:05:34,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:05:34,315 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-08-22 23:05:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:34,591 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-08-22 23:05:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:05:34,591 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-08-22 23:05:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:34,593 INFO L225 Difference]: With dead ends: 38 [2020-08-22 23:05:34,593 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 23:05:34,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:05:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 23:05:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-22 23:05:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 23:05:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-08-22 23:05:34,604 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-08-22 23:05:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:34,604 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-08-22 23:05:34,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:05:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-08-22 23:05:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 23:05:34,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:34,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:34,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:05:34,609 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:34,610 INFO L82 PathProgramCache]: Analyzing trace with hash -934609001, now seen corresponding path program 3 times [2020-08-22 23:05:34,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:34,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169083026] [2020-08-22 23:05:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:34,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:34,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169083026] [2020-08-22 23:05:34,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:34,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:05:34,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200832768] [2020-08-22 23:05:34,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:05:34,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:34,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:05:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:05:34,892 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2020-08-22 23:05:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:35,202 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-08-22 23:05:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:05:35,203 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-08-22 23:05:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:35,205 INFO L225 Difference]: With dead ends: 43 [2020-08-22 23:05:35,205 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 23:05:35,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:05:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 23:05:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 23:05:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 23:05:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-08-22 23:05:35,216 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-08-22 23:05:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:35,216 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-08-22 23:05:35,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:05:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-08-22 23:05:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 23:05:35,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:35,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:35,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:05:35,219 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:35,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:35,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1774497961, now seen corresponding path program 4 times [2020-08-22 23:05:35,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:35,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16092119] [2020-08-22 23:05:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:35,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:35,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16092119] [2020-08-22 23:05:35,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:35,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:05:35,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754926582] [2020-08-22 23:05:35,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:05:35,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:05:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:05:35,499 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 18 states. [2020-08-22 23:05:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:35,911 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-08-22 23:05:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 23:05:35,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-08-22 23:05:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:35,914 INFO L225 Difference]: With dead ends: 48 [2020-08-22 23:05:35,914 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 23:05:35,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:05:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 23:05:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-22 23:05:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:05:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-08-22 23:05:35,936 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-08-22 23:05:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:35,940 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-08-22 23:05:35,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:05:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-08-22 23:05:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 23:05:35,949 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:35,949 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:35,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:05:35,950 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:35,951 INFO L82 PathProgramCache]: Analyzing trace with hash -194454825, now seen corresponding path program 5 times [2020-08-22 23:05:35,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:35,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380061688] [2020-08-22 23:05:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:36,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:36,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380061688] [2020-08-22 23:05:36,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:36,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 23:05:36,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211506241] [2020-08-22 23:05:36,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 23:05:36,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 23:05:36,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:05:36,303 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 21 states. [2020-08-22 23:05:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:36,854 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-08-22 23:05:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 23:05:36,855 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-08-22 23:05:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:36,856 INFO L225 Difference]: With dead ends: 53 [2020-08-22 23:05:36,856 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 23:05:36,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:05:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 23:05:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-22 23:05:36,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 23:05:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-08-22 23:05:36,867 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-08-22 23:05:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:36,867 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-08-22 23:05:36,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 23:05:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-08-22 23:05:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 23:05:36,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:36,869 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:36,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:05:36,870 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:36,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:36,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1783487849, now seen corresponding path program 6 times [2020-08-22 23:05:36,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:36,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841677756] [2020-08-22 23:05:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:37,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:37,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841677756] [2020-08-22 23:05:37,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:37,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 23:05:37,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115307875] [2020-08-22 23:05:37,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 23:05:37,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 23:05:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:05:37,293 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-08-22 23:05:37,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:37,975 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-08-22 23:05:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 23:05:37,976 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-08-22 23:05:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:37,978 INFO L225 Difference]: With dead ends: 58 [2020-08-22 23:05:37,978 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 23:05:37,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:05:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 23:05:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-08-22 23:05:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 23:05:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-08-22 23:05:37,988 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-08-22 23:05:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:37,989 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-08-22 23:05:37,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 23:05:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-08-22 23:05:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 23:05:37,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:37,990 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:37,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:05:37,991 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:37,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1046324759, now seen corresponding path program 7 times [2020-08-22 23:05:37,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:37,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654784935] [2020-08-22 23:05:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:38,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:38,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654784935] [2020-08-22 23:05:38,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:38,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 23:05:38,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355954665] [2020-08-22 23:05:38,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 23:05:38,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:38,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 23:05:38,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:05:38,477 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2020-08-22 23:05:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:39,421 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-08-22 23:05:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 23:05:39,423 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-08-22 23:05:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:39,425 INFO L225 Difference]: With dead ends: 63 [2020-08-22 23:05:39,425 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 23:05:39,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:05:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 23:05:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-22 23:05:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 23:05:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-08-22 23:05:39,434 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-08-22 23:05:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:39,435 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-08-22 23:05:39,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 23:05:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-08-22 23:05:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 23:05:39,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:39,437 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:39,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:05:39,437 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:39,438 INFO L82 PathProgramCache]: Analyzing trace with hash 232135209, now seen corresponding path program 8 times [2020-08-22 23:05:39,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:39,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42470700] [2020-08-22 23:05:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:39,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:39,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42470700] [2020-08-22 23:05:39,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:39,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 23:05:39,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77516679] [2020-08-22 23:05:39,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 23:05:39,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:39,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 23:05:39,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2020-08-22 23:05:39,988 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 30 states. [2020-08-22 23:05:41,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:41,015 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-08-22 23:05:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 23:05:41,016 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 56 [2020-08-22 23:05:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:41,017 INFO L225 Difference]: With dead ends: 68 [2020-08-22 23:05:41,017 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 23:05:41,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:05:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 23:05:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-08-22 23:05:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 23:05:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-08-22 23:05:41,028 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-08-22 23:05:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:41,028 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-08-22 23:05:41,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 23:05:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-08-22 23:05:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 23:05:41,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:41,030 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:41,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:05:41,031 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash 977101143, now seen corresponding path program 9 times [2020-08-22 23:05:41,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:41,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149117677] [2020-08-22 23:05:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:41,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:41,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149117677] [2020-08-22 23:05:41,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:41,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 23:05:41,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141043772] [2020-08-22 23:05:41,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 23:05:41,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:41,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 23:05:41,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:05:41,759 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 33 states. [2020-08-22 23:05:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:43,061 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-08-22 23:05:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 23:05:43,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-08-22 23:05:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:43,063 INFO L225 Difference]: With dead ends: 73 [2020-08-22 23:05:43,063 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 23:05:43,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=2998, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 23:05:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 23:05:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-22 23:05:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 23:05:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-08-22 23:05:43,078 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-08-22 23:05:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:43,078 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-08-22 23:05:43,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 23:05:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-08-22 23:05:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 23:05:43,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:43,080 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:43,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:05:43,080 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash 751396585, now seen corresponding path program 10 times [2020-08-22 23:05:43,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:43,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062795626] [2020-08-22 23:05:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:43,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:43,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062795626] [2020-08-22 23:05:43,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:43,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 23:05:43,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902316114] [2020-08-22 23:05:43,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 23:05:43,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:43,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 23:05:43,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:05:43,866 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 36 states. [2020-08-22 23:05:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:45,417 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-08-22 23:05:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 23:05:45,418 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 66 [2020-08-22 23:05:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:45,419 INFO L225 Difference]: With dead ends: 68 [2020-08-22 23:05:45,419 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:05:45,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=221, Invalid=3685, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 23:05:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:05:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:05:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:05:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:05:45,422 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-08-22 23:05:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:45,422 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:05:45,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 23:05:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:05:45,422 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:05:45,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:05:45,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:05:45,857 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-08-22 23:05:45,979 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-08-22 23:05:46,111 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:46,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:46,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:46,112 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:05:46,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:05:46,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:46,113 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:46,113 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:46,113 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 23:05:46,113 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 23:05:46,113 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:46,113 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 24) the Hoare annotation is: true [2020-08-22 23:05:46,116 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (let ((.cse1 (* 6 main_~y~0))) (let ((.cse0 (<= (+ main_~x~0 65) .cse1))) (or (<= (+ main_~x~0 51) main_~y~0) (<= (+ main_~x~0 50) 0) (<= (+ main_~x~0 56) (* 3 main_~y~0)) (and .cse0 (<= (+ main_~x~0 86) (* 8 main_~y~0))) (and (<= (+ main_~x~0 105) (* 10 main_~y~0)) .cse0) (<= (+ main_~x~0 60) (* 4 main_~y~0)) (<= (+ main_~x~0 71) .cse1)))) [2020-08-22 23:05:46,116 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (<= (+ main_~x~0 50) 0) [2020-08-22 23:05:46,117 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-08-22 23:05:46,117 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 23:05:46,117 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 24) the Hoare annotation is: true [2020-08-22 23:05:46,117 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-08-22 23:05:46,117 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-08-22 23:05:46,119 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (or (<= (+ main_~x~0 95) (* 10 main_~y~0)) (<= (+ main_~x~0 50) main_~y~0) (<= (+ main_~x~0 53) (* 3 main_~y~0)) (<= (+ main_~x~0 71) (* 7 main_~y~0)) (<= (+ main_~x~0 78) (* 8 main_~y~0)) (<= (+ main_~x~0 60) (* 5 main_~y~0))) [2020-08-22 23:05:46,120 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (or (let ((.cse0 (+ main_~x~0 95))) (and (<= .cse0 (* 10 main_~y~0)) (<= .cse0 (* 10 |main_#t~post1|)))) (let ((.cse1 (+ main_~x~0 50))) (and (<= .cse1 main_~y~0) (<= .cse1 |main_#t~post1|))) (let ((.cse2 (+ main_~x~0 60))) (and (<= .cse2 (* 5 |main_#t~post1|)) (<= .cse2 (* 5 main_~y~0)))) (let ((.cse3 (+ main_~x~0 53))) (and (<= .cse3 (* 3 |main_#t~post1|)) (<= .cse3 (* 3 main_~y~0)))) (let ((.cse4 (+ main_~x~0 71))) (and (<= .cse4 (* 7 |main_#t~post1|)) (<= .cse4 (* 7 main_~y~0)))) (let ((.cse5 (+ main_~x~0 78))) (and (<= .cse5 (* 8 |main_#t~post1|)) (<= .cse5 (* 8 main_~y~0))))) [2020-08-22 23:05:46,120 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse2 (+ main_~x~0 51)) (.cse1 (+ main_~x~0 71)) (.cse0 (+ main_~x~0 95))) (or (and (<= .cse0 (* 9 main_~y~0)) (<= (+ main_~x~0 86) (* 9 |main_#t~post1|))) (and (<= .cse1 (* 7 |main_#t~post1|)) (<= (+ main_~x~0 78) (* 7 main_~y~0))) (and (<= .cse2 main_~y~0) (<= (+ main_~x~0 50) |main_#t~post1|)) (and (<= (+ main_~x~0 53) (* 2 main_~y~0)) (<= .cse2 (* 2 |main_#t~post1|))) (and (<= (+ main_~x~0 56) (* 4 |main_#t~post1|)) (<= (+ main_~x~0 60) (* 4 main_~y~0))) (and (<= .cse1 (* 6 main_~y~0)) (<= (+ main_~x~0 65) (* 6 |main_#t~post1|))) (and (<= (+ main_~x~0 105) (* 10 main_~y~0)) (<= .cse0 (* 10 |main_#t~post1|))))) [2020-08-22 23:05:46,120 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (<= (+ main_~x~0 50) 0) [2020-08-22 23:05:46,121 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (<= (+ main_~x~0 51) main_~y~0) (<= (+ main_~x~0 50) 0) (<= (+ main_~x~0 56) (* 3 main_~y~0)) (<= (+ main_~x~0 105) (* 10 main_~y~0)) (<= (+ main_~x~0 60) (* 4 main_~y~0)) (<= (+ main_~x~0 86) (* 8 main_~y~0)) (<= (+ main_~x~0 71) (* 6 main_~y~0))) [2020-08-22 23:05:46,121 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (<= (+ main_~x~0 50) 0) [2020-08-22 23:05:46,121 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (and (<= 11 main_~y~0) (<= (+ main_~x~0 105) (* 10 main_~y~0))) [2020-08-22 23:05:46,121 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 23:05:46,122 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (<= (+ main_~x~0 50) 0) [2020-08-22 23:05:46,122 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:46,122 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:46,122 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:46,122 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 23:05:46,123 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:46,123 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:46,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:05:46 BoogieIcfgContainer [2020-08-22 23:05:46,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:05:46,174 INFO L168 Benchmark]: Toolchain (without parser) took 13748.28 ms. Allocated memory was 136.8 MB in the beginning and 336.1 MB in the end (delta: 199.2 MB). Free memory was 101.5 MB in the beginning and 219.7 MB in the end (delta: -118.2 MB). Peak memory consumption was 81.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:46,177 INFO L168 Benchmark]: CDTParser took 1.06 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:05:46,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.31 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:46,181 INFO L168 Benchmark]: Boogie Preprocessor took 42.12 ms. Allocated memory is still 136.8 MB. Free memory was 91.9 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:46,181 INFO L168 Benchmark]: RCFGBuilder took 436.22 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.3 MB in the beginning and 166.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:46,182 INFO L168 Benchmark]: TraceAbstraction took 12927.28 ms. Allocated memory was 200.8 MB in the beginning and 336.1 MB in the end (delta: 135.3 MB). Free memory was 166.2 MB in the beginning and 219.7 MB in the end (delta: -53.5 MB). Peak memory consumption was 81.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:46,189 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.06 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.31 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.12 ms. Allocated memory is still 136.8 MB. Free memory was 91.9 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 436.22 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.3 MB in the beginning and 166.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12927.28 ms. Allocated memory was 200.8 MB in the beginning and 336.1 MB in the end (delta: 135.3 MB). Free memory was 166.2 MB in the beginning and 219.7 MB in the end (delta: -53.5 MB). Peak memory consumption was 81.8 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: 18]: Loop Invariant Derived loop invariant: (((((x + 51 <= y || x + 50 <= 0) || x + 56 <= 3 * y) || x + 105 <= 10 * y) || x + 60 <= 4 * y) || x + 86 <= 8 * y) || x + 71 <= 6 * y - 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: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.0s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 242 SDtfs, 202 SDslu, 2195 SDs, 0 SdLazy, 5535 SolverSat, 136 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 399 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2709 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=11, 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, 12 MinimizatonAttempts, 10 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 95 PreInvPairs, 179 NumberOfFragments, 399 HoareAnnotationTreeSize, 95 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 29 FomulaSimplificationsInter, 316 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 467 NumberOfCodeBlocks, 467 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 455 ConstructedInterpolants, 0 QuantifiedInterpolants, 110215 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/880 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...