/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.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:15:09,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:15:09,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:15:09,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:15:09,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:15:09,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:15:09,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:15:09,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:15:09,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:15:09,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:15:09,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:15:09,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:15:09,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:15:09,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:15:09,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:15:09,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:15:09,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:15:09,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:15:09,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:15:09,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:15:09,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:15:09,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:15:09,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:15:09,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:15:09,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:15:09,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:15:09,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:15:09,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:15:09,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:15:09,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:15:09,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:15:09,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:15:09,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:15:09,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:15:09,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:15:09,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:15:09,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:15:09,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:15:09,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:15:09,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:15:09,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:15:09,689 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:15:09,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:15:09,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:15:09,689 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:15:09,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:15:09,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:15:09,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:15:09,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:15:09,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:15:09,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:15:09,691 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 [2020-09-04 23:15:10,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:15:10,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:15:10,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:15:10,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:15:10,187 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:15:10,188 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-09-04 23:15:10,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51af80261/68f03308cf4549639087cb60aab4f892/FLAG68cda2f71 [2020-09-04 23:15:10,865 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:15:10,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-09-04 23:15:10,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51af80261/68f03308cf4549639087cb60aab4f892/FLAG68cda2f71 [2020-09-04 23:15:11,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51af80261/68f03308cf4549639087cb60aab4f892 [2020-09-04 23:15:11,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:15:11,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:15:11,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:15:11,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:15:11,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:15:11,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784726a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11, skipping insertion in model container [2020-09-04 23:15:11,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:15:11,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:15:11,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:15:11,532 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:15:11,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:15:11,569 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:15:11,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11 WrapperNode [2020-09-04 23:15:11,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:15:11,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:15:11,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:15:11,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:15:11,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (1/1) ... [2020-09-04 23:15:11,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:15:11,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:15:11,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:15:11,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:15:11,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:15:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:15:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:15:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:15:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:15:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:15:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:15:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:15:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:15:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:15:11,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:15:11,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:15:11,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:15:12,089 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:15:12,089 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 23:15:12,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:15:12 BoogieIcfgContainer [2020-09-04 23:15:12,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:15:12,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:15:12,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:15:12,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:15:12,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:15:11" (1/3) ... [2020-09-04 23:15:12,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcbbd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:15:12, skipping insertion in model container [2020-09-04 23:15:12,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:11" (2/3) ... [2020-09-04 23:15:12,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcbbd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:15:12, skipping insertion in model container [2020-09-04 23:15:12,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:15:12" (3/3) ... [2020-09-04 23:15:12,135 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2020-09-04 23:15:12,148 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:15:12,161 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:15:12,184 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:15:12,219 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:15:12,219 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:15:12,219 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:15:12,219 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:15:12,219 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:15:12,220 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:15:12,220 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:15:12,221 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:15:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-04 23:15:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 23:15:12,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:12,265 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] [2020-09-04 23:15:12,266 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:12,274 INFO L82 PathProgramCache]: Analyzing trace with hash 341466613, now seen corresponding path program 1 times [2020-09-04 23:15:12,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:12,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113141251] [2020-09-04 23:15:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:12,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:12,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113141251] [2020-09-04 23:15:12,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:15:12,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:15:12,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146715823] [2020-09-04 23:15:12,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:15:12,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:12,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:15:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:15:12,599 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-09-04 23:15:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:12,761 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-04 23:15:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 23:15:12,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-09-04 23:15:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:12,779 INFO L225 Difference]: With dead ends: 51 [2020-09-04 23:15:12,779 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 23:15:12,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:15:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 23:15:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-09-04 23:15:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-04 23:15:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-04 23:15:12,850 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2020-09-04 23:15:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:12,851 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-04 23:15:12,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:15:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-04 23:15:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 23:15:12,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:12,853 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] [2020-09-04 23:15:12,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:15:12,854 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash 178703795, now seen corresponding path program 1 times [2020-09-04 23:15:12,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:12,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394667020] [2020-09-04 23:15:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:13,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394667020] [2020-09-04 23:15:13,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:13,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:15:13,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44594725] [2020-09-04 23:15:13,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:15:13,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:13,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:15:13,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:15:13,091 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-09-04 23:15:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:13,486 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-04 23:15:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:15:13,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-04 23:15:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:13,489 INFO L225 Difference]: With dead ends: 38 [2020-09-04 23:15:13,489 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 23:15:13,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:15:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 23:15:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-04 23:15:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 23:15:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-09-04 23:15:13,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2020-09-04 23:15:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:13,507 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-09-04 23:15:13,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:15:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-09-04 23:15:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 23:15:13,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:13,509 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 23:15:13,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:15:13,509 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash 563687025, now seen corresponding path program 2 times [2020-09-04 23:15:13,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:13,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982996900] [2020-09-04 23:15:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:13,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982996900] [2020-09-04 23:15:13,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:13,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:15:13,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410959162] [2020-09-04 23:15:13,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:15:13,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:13,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:15:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:15:13,726 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2020-09-04 23:15:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:14,031 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-04 23:15:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:15:14,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-09-04 23:15:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:14,033 INFO L225 Difference]: With dead ends: 42 [2020-09-04 23:15:14,033 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 23:15:14,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:15:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 23:15:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-09-04 23:15:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 23:15:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-09-04 23:15:14,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2020-09-04 23:15:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:14,045 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-09-04 23:15:14,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:15:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-09-04 23:15:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:15:14,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:14,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:14,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:15:14,048 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1026490321, now seen corresponding path program 3 times [2020-09-04 23:15:14,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:14,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597362295] [2020-09-04 23:15:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:14,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:14,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597362295] [2020-09-04 23:15:14,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:14,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:15:14,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272291381] [2020-09-04 23:15:14,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:15:14,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:15:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:15:14,293 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 13 states. [2020-09-04 23:15:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:14,700 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-04 23:15:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:15:14,700 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-04 23:15:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:14,702 INFO L225 Difference]: With dead ends: 46 [2020-09-04 23:15:14,702 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 23:15:14,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:15:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 23:15:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-04 23:15:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 23:15:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-04 23:15:14,714 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 33 [2020-09-04 23:15:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:14,715 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-04 23:15:14,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:15:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-04 23:15:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 23:15:14,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:14,717 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:14,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:15:14,717 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:14,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:14,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2083373805, now seen corresponding path program 4 times [2020-09-04 23:15:14,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:14,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159595149] [2020-09-04 23:15:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:14,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:14,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159595149] [2020-09-04 23:15:14,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:14,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:15:14,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984074262] [2020-09-04 23:15:14,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:15:14,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:15:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:15:14,970 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 15 states. [2020-09-04 23:15:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:15,390 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-04 23:15:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 23:15:15,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-09-04 23:15:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:15,393 INFO L225 Difference]: With dead ends: 50 [2020-09-04 23:15:15,393 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 23:15:15,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:15:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 23:15:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-04 23:15:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 23:15:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-04 23:15:15,404 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 37 [2020-09-04 23:15:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:15,405 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-04 23:15:15,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:15:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-04 23:15:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 23:15:15,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:15,407 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:15,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:15:15,407 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:15,408 INFO L82 PathProgramCache]: Analyzing trace with hash -540084565, now seen corresponding path program 5 times [2020-09-04 23:15:15,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:15,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629920668] [2020-09-04 23:15:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-04 23:15:15,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629920668] [2020-09-04 23:15:15,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:15:15,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 23:15:15,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442777954] [2020-09-04 23:15:15,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:15:15,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:15,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:15:15,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:15:15,504 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 9 states. [2020-09-04 23:15:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:15,702 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-04 23:15:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:15:15,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-09-04 23:15:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:15,703 INFO L225 Difference]: With dead ends: 42 [2020-09-04 23:15:15,703 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 23:15:15,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:15:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 23:15:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 23:15:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 23:15:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 23:15:15,706 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-09-04 23:15:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:15,706 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 23:15:15,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:15:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 23:15:15,706 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 23:15:15,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:15:15,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 23:15:16,403 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:15:16,404 INFO L271 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: true [2020-09-04 23:15:16,404 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_65~0 |old(~__return_65~0)|)) [2020-09-04 23:15:16,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:15:16,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:15:16,404 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 23:15:16,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 23:15:16,405 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:15:16,405 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-09-04 23:15:16,405 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-04 23:15:16,405 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-04 23:15:16,405 INFO L268 CegarLoopResult]: For program point L5-3(lines 4 6) no Hoare annotation was computed. [2020-09-04 23:15:16,405 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-09-04 23:15:16,405 INFO L264 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 1) main_~main__y~0)) [2020-09-04 23:15:16,406 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 23:15:16,406 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 11 58) the Hoare annotation is: true [2020-09-04 23:15:16,406 INFO L264 CegarLoopResult]: At program point L23(lines 23 56) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 23:15:16,406 INFO L271 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: true [2020-09-04 23:15:16,406 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 23:15:16,407 INFO L264 CegarLoopResult]: At program point L17(lines 17 57) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 23:15:16,407 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2020-09-04 23:15:16,407 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-09-04 23:15:16,407 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 11 58) the Hoare annotation is: true [2020-09-04 23:15:16,409 INFO L264 CegarLoopResult]: At program point L44(lines 44 53) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (not (= main_~__VERIFIER_assert__cond~0 0))) (.cse2 (= |old(~__return_65~0)| ~__return_65~0))) (or (and (<= 2 main_~main__y~0) .cse0 .cse1 .cse2 (<= (+ main_~main__x~0 2) main_~main__y~0)) (and .cse0 .cse1 (<= 15 main_~main__y~0) .cse2 (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0))))) [2020-09-04 23:15:16,410 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= 15 main_~main__y~0) .cse1 (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0))) (and (<= 2 main_~main__y~0) .cse0 .cse1 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2020-09-04 23:15:16,410 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and (<= 2 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)) (and (<= 15 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0))))) [2020-09-04 23:15:16,410 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 1) main_~main__y~0)) [2020-09-04 23:15:16,410 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and (<= (+ main_~main__x~0 1) 0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2020-09-04 23:15:16,410 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) the Hoare annotation is: false [2020-09-04 23:15:16,411 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2020-09-04 23:15:16,411 INFO L264 CegarLoopResult]: At program point L51(line 51) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2020-09-04 23:15:16,411 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 23:15:16,411 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 23:15:16,411 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: false [2020-09-04 23:15:16,412 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2020-09-04 23:15:16,412 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2020-09-04 23:15:16,412 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= 15 main_~main__y~0) .cse1 (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0))) (and (<= 2 main_~main__y~0) .cse0 .cse1 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2020-09-04 23:15:16,412 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and (<= 2 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)) (and (<= 15 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 60) (* 4 main_~main__y~0))))) [2020-09-04 23:15:16,412 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2020-09-04 23:15:16,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:15:16 BoogieIcfgContainer [2020-09-04 23:15:16,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:15:16,440 INFO L168 Benchmark]: Toolchain (without parser) took 5186.68 ms. Allocated memory was 139.5 MB in the beginning and 245.9 MB in the end (delta: 106.4 MB). Free memory was 104.0 MB in the beginning and 158.5 MB in the end (delta: -54.6 MB). Peak memory consumption was 112.0 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:16,441 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 139.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:15:16,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.18 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:16,443 INFO L168 Benchmark]: Boogie Preprocessor took 113.49 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 182.0 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:16,444 INFO L168 Benchmark]: RCFGBuilder took 413.48 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 168.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:16,445 INFO L168 Benchmark]: TraceAbstraction took 4321.59 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 167.5 MB in the beginning and 158.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 112.1 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:16,449 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 139.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.18 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.49 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 182.0 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.48 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 168.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4321.59 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 167.5 MB in the beginning and 158.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 112.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: 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: 28]: Loop Invariant Derived loop invariant: (\old(__return_65) == __return_65 && main__x + 50 <= 0) || (\old(__return_65) == __return_65 && main__x + 2 <= main__y) - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 259 SDslu, 209 SDs, 0 SdLazy, 851 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 34 PreInvPairs, 84 NumberOfFragments, 323 HoareAnnotationTreeSize, 34 FomulaSimplifications, 1456 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 34 FomulaSimplificationsInter, 413 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 19368 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 45/95 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...