/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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:10:45,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:10:45,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:10:45,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:10:45,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:10:45,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:10:45,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:10:45,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:10:45,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:10:45,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:10:45,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:10:45,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:10:45,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:10:45,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:10:45,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:10:45,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:10:45,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:10:45,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:10:45,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:10:45,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:10:45,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:10:45,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:10:45,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:10:45,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:10:45,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:10:45,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:10:45,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:10:45,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:10:45,833 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 23:10:45,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:10:45,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:10:45,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:10:45,855 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:10:45,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:10:45,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:10:45,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:10:45,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:10:45,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:10:45,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:10:45,858 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:10:45,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:10:45,858 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:10:45,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:10:45,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:10:45,859 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:10:45,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:10:45,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:10:45,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:10:45,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:10:45,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:10:45,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:10:45,861 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 23:10:46,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:10:46,380 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:10:46,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:10:46,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:10:46,387 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:10:46,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-04 23:10:46,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4791c5595/f6846da3921944ccb57163aa626666ec/FLAG2d66a834f [2020-09-04 23:10:47,045 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:10:47,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-04 23:10:47,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4791c5595/f6846da3921944ccb57163aa626666ec/FLAG2d66a834f [2020-09-04 23:10:47,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4791c5595/f6846da3921944ccb57163aa626666ec [2020-09-04 23:10:47,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:10:47,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:10:47,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:47,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:10:47,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:10:47,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a39462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47, skipping insertion in model container [2020-09-04 23:10:47,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:10:47,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:10:47,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:47,688 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:10:47,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:47,729 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:10:47,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47 WrapperNode [2020-09-04 23:10:47,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:47,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:10:47,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:10:47,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:10:47,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (1/1) ... [2020-09-04 23:10:47,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:10:47,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:10:47,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:10:47,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:10:47,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (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 23:10:47,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:10:47,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:10:47,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:10:47,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:10:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:10:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:10:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:10:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:10:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:10:48,150 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:10:48,150 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:10:48,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:48 BoogieIcfgContainer [2020-09-04 23:10:48,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:10:48,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:10:48,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:10:48,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:10:48,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:10:47" (1/3) ... [2020-09-04 23:10:48,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3118ffcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:48, skipping insertion in model container [2020-09-04 23:10:48,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:47" (2/3) ... [2020-09-04 23:10:48,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3118ffcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:48, skipping insertion in model container [2020-09-04 23:10:48,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:48" (3/3) ... [2020-09-04 23:10:48,194 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-04 23:10:48,228 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:10:48,241 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:10:48,281 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:10:48,306 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:10:48,306 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:10:48,306 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:10:48,306 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:10:48,307 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:10:48,307 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:10:48,307 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:10:48,307 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:10:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 23:10:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 23:10:48,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:48,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:48,335 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-04 23:10:48,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:48,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784670970] [2020-09-04 23:10:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:48,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:48,494 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 23:10:48,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784670970] [2020-09-04 23:10:48,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:48,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 23:10:48,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244256948] [2020-09-04 23:10:48,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 23:10:48,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:48,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 23:10:48,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:10:48,526 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-04 23:10:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:48,558 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-04 23:10:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 23:10:48,560 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-04 23:10:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:48,571 INFO L225 Difference]: With dead ends: 35 [2020-09-04 23:10:48,571 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 23:10:48,576 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 [2020-09-04 23:10:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 23:10:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 23:10:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 23:10:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 23:10:48,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-04 23:10:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:48,627 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 23:10:48,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 23:10:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 23:10:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 23:10:48,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:48,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:48,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:10:48,630 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-09-04 23:10:48,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:48,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862374438] [2020-09-04 23:10:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:48,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:48,689 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 23:10:48,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862374438] [2020-09-04 23:10:48,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:48,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:10:48,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877847119] [2020-09-04 23:10:48,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:10:48,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:10:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:10:48,694 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-09-04 23:10:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:48,746 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-09-04 23:10:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:10:48,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-04 23:10:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:48,748 INFO L225 Difference]: With dead ends: 34 [2020-09-04 23:10:48,748 INFO L226 Difference]: Without dead ends: 23 [2020-09-04 23:10:48,749 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 [2020-09-04 23:10:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-04 23:10:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-04 23:10:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-04 23:10:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-04 23:10:48,758 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-09-04 23:10:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:48,758 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-04 23:10:48,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:10:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-04 23:10:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 23:10:48,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:48,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:48,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:10:48,760 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:48,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-04 23:10:48,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:48,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94493550] [2020-09-04 23:10:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:48,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:48,841 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 23:10:48,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94493550] [2020-09-04 23:10:48,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:48,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 23:10:48,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934845492] [2020-09-04 23:10:48,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:10:48,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:10:48,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:48,844 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-04 23:10:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:48,933 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-09-04 23:10:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:10:48,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-04 23:10:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:48,935 INFO L225 Difference]: With dead ends: 40 [2020-09-04 23:10:48,936 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 23:10:48,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:10:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 23:10:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-04 23:10:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-04 23:10:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-04 23:10:48,945 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-09-04 23:10:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:48,945 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-04 23:10:48,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:10:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-04 23:10:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 23:10:48,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:48,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:48,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:10:48,948 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times [2020-09-04 23:10:48,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:48,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562238806] [2020-09-04 23:10:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:49,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562238806] [2020-09-04 23:10:49,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:49,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 23:10:49,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930952329] [2020-09-04 23:10:49,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:10:49,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:10:49,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:10:49,041 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-09-04 23:10:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:49,149 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-04 23:10:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:10:49,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-04 23:10:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:49,151 INFO L225 Difference]: With dead ends: 45 [2020-09-04 23:10:49,151 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 23:10:49,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:10:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 23:10:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-04 23:10:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 23:10:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-04 23:10:49,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2020-09-04 23:10:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:49,161 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-04 23:10:49,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:10:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-04 23:10:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 23:10:49,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:49,163 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:49,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:10:49,163 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1860713659, now seen corresponding path program 3 times [2020-09-04 23:10:49,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:49,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132423568] [2020-09-04 23:10:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:49,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132423568] [2020-09-04 23:10:49,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:49,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:10:49,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173787159] [2020-09-04 23:10:49,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:10:49,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:49,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:10:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:10:49,331 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-09-04 23:10:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:49,492 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-04 23:10:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:10:49,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-04 23:10:49,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:49,494 INFO L225 Difference]: With dead ends: 44 [2020-09-04 23:10:49,494 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 23:10:49,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:10:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 23:10:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-04 23:10:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 23:10:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-04 23:10:49,504 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-09-04 23:10:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:49,505 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-04 23:10:49,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:10:49,505 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-04 23:10:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 23:10:49,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:49,507 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:49,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:10:49,507 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:49,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1338804338, now seen corresponding path program 1 times [2020-09-04 23:10:49,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:49,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328165188] [2020-09-04 23:10:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:49,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328165188] [2020-09-04 23:10:49,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:49,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:10:49,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107777272] [2020-09-04 23:10:49,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:10:49,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:49,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:10:49,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:10:49,631 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2020-09-04 23:10:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:49,814 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-09-04 23:10:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 23:10:49,815 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-09-04 23:10:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:49,818 INFO L225 Difference]: With dead ends: 49 [2020-09-04 23:10:49,818 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 23:10:49,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:10:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 23:10:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-04 23:10:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 23:10:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-04 23:10:49,829 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-09-04 23:10:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:49,829 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-04 23:10:49,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:10:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-04 23:10:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 23:10:49,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:49,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:49,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:10:49,831 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:49,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 2 times [2020-09-04 23:10:49,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:49,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551055988] [2020-09-04 23:10:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:49,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551055988] [2020-09-04 23:10:49,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:49,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:10:49,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541582196] [2020-09-04 23:10:49,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:10:49,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:10:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:10:49,975 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2020-09-04 23:10:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:50,194 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-04 23:10:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 23:10:50,194 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-09-04 23:10:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:50,196 INFO L225 Difference]: With dead ends: 54 [2020-09-04 23:10:50,196 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 23:10:50,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:10:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 23:10:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-04 23:10:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 23:10:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-04 23:10:50,206 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-09-04 23:10:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:50,207 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-04 23:10:50,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:10:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-04 23:10:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-04 23:10:50,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:50,209 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:50,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:10:50,210 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash 350505490, now seen corresponding path program 3 times [2020-09-04 23:10:50,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:50,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394396356] [2020-09-04 23:10:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:50,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:50,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394396356] [2020-09-04 23:10:50,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:50,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:10:50,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797813968] [2020-09-04 23:10:50,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:10:50,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:50,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:10:50,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:10:50,405 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-09-04 23:10:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:50,675 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-09-04 23:10:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 23:10:50,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-09-04 23:10:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:50,679 INFO L225 Difference]: With dead ends: 59 [2020-09-04 23:10:50,680 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 23:10:50,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:10:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 23:10:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-04 23:10:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 23:10:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-04 23:10:50,696 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45 [2020-09-04 23:10:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:50,697 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-04 23:10:50,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:10:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-04 23:10:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 23:10:50,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:50,701 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:50,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:10:50,701 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:50,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:50,702 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 4 times [2020-09-04 23:10:50,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:50,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072999134] [2020-09-04 23:10:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:50,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:50,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072999134] [2020-09-04 23:10:50,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:50,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 23:10:50,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951105967] [2020-09-04 23:10:50,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 23:10:50,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:50,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 23:10:50,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:10:50,938 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-09-04 23:10:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:51,265 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-04 23:10:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 23:10:51,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-09-04 23:10:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:51,268 INFO L225 Difference]: With dead ends: 61 [2020-09-04 23:10:51,268 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 23:10:51,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:10:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 23:10:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-04 23:10:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 23:10:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-04 23:10:51,278 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-04 23:10:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:51,279 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-04 23:10:51,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 23:10:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-04 23:10:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 23:10:51,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:51,280 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:51,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:10:51,281 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 5 times [2020-09-04 23:10:51,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:51,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613042236] [2020-09-04 23:10:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:51,298 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:51,314 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:51,348 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:10:51,348 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:10:51,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:10:51,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:10:51 BoogieIcfgContainer [2020-09-04 23:10:51,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:10:51,385 INFO L168 Benchmark]: Toolchain (without parser) took 3974.90 ms. Allocated memory was 138.9 MB in the beginning and 246.4 MB in the end (delta: 107.5 MB). Free memory was 103.7 MB in the beginning and 112.6 MB in the end (delta: -8.9 MB). Peak memory consumption was 98.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:51,386 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:10:51,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.93 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:51,388 INFO L168 Benchmark]: Boogie Preprocessor took 113.80 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 181.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:51,389 INFO L168 Benchmark]: RCFGBuilder took 312.14 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:51,390 INFO L168 Benchmark]: TraceAbstraction took 3215.31 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 168.5 MB in the beginning and 112.6 MB in the end (delta: 56.0 MB). Peak memory consumption was 100.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:51,394 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.93 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.80 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 181.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.14 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3215.31 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 168.5 MB in the beginning and 112.6 MB in the end (delta: 56.0 MB). Peak memory consumption was 100.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; VAL [sn=0] [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 VAL [i=1, sn=0] [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 VAL [i=2, sn=2] [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 VAL [i=3, sn=4] [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 133 SDslu, 692 SDs, 0 SdLazy, 414 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=9, 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, 9 MinimizatonAttempts, 20 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 257 ConstructedInterpolants, 0 QuantifiedInterpolants, 21583 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/324 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 incorrect! Received shutdown request...