/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:49:22,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:49:22,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:49:22,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:49:22,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:49:22,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:49:22,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:49:22,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:49:22,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:49:22,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:49:22,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:49:22,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:49:22,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:49:22,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:49:22,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:49:22,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:49:22,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:49:22,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:49:22,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:49:22,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:49:22,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:49:22,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:49:22,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:49:22,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:49:22,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:49:22,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:49:22,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:49:22,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:49:22,466 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 17:49:22,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:49:22,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:49:22,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:49:22,480 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:49:22,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:49:22,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:49:22,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:49:22,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:49:22,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:49:22,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:49:22,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:49:22,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:49:22,482 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:49:22,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:49:22,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:49:22,482 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:49:22,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:49:22,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:49:22,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:49:22,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:49:22,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:49:22,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:49:22,484 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:49:22,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:49:22,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:49:22,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:49:22,941 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:49:22,943 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:49:22,945 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-04 17:49:23,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e60c2254c/fde536abd5d54a5586b592c547c69b0d/FLAGa49beb00a [2020-09-04 17:49:23,580 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:49:23,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-04 17:49:23,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e60c2254c/fde536abd5d54a5586b592c547c69b0d/FLAGa49beb00a [2020-09-04 17:49:23,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e60c2254c/fde536abd5d54a5586b592c547c69b0d [2020-09-04 17:49:23,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:49:23,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:49:23,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:49:23,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:49:23,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:49:23,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:49:23" (1/1) ... [2020-09-04 17:49:23,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@738c6f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:23, skipping insertion in model container [2020-09-04 17:49:23,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:49:23" (1/1) ... [2020-09-04 17:49:23,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:49:23,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:49:24,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:49:24,191 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:49:24,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:49:24,229 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:49:24,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24 WrapperNode [2020-09-04 17:49:24,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:49:24,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:49:24,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:49:24,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:49:24,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (1/1) ... [2020-09-04 17:49:24,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (1/1) ... [2020-09-04 17:49:24,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (1/1) ... [2020-09-04 17:49:24,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (1/1) ... [2020-09-04 17:49:24,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (1/1) ... [2020-09-04 17:49:24,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (1/1) ... [2020-09-04 17:49:24,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (1/1) ... [2020-09-04 17:49:24,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:49:24,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:49:24,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:49:24,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:49:24,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (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 17:49:24,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:49:24,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:49:24,438 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:49:24,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:49:24,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:49:24,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:49:24,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:49:24,438 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:49:24,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:49:24,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:49:24,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:49:24,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:49:24,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:49:24,682 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:49:24,685 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 17:49:24,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:49:24 BoogieIcfgContainer [2020-09-04 17:49:24,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:49:24,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:49:24,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:49:24,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:49:24,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:49:23" (1/3) ... [2020-09-04 17:49:24,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cbcfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:49:24, skipping insertion in model container [2020-09-04 17:49:24,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:24" (2/3) ... [2020-09-04 17:49:24,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cbcfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:49:24, skipping insertion in model container [2020-09-04 17:49:24,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:49:24" (3/3) ... [2020-09-04 17:49:24,710 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-09-04 17:49:24,722 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:49:24,737 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:49:24,769 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:49:24,798 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:49:24,798 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:49:24,798 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:49:24,799 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:49:24,799 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:49:24,799 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:49:24,799 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:49:24,799 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:49:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-04 17:49:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 17:49:24,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:24,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:24,831 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:24,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1930258608, now seen corresponding path program 1 times [2020-09-04 17:49:24,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:24,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22655272] [2020-09-04 17:49:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:24,922 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:24,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:25,007 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 17:49:25,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22655272] [2020-09-04 17:49:25,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:25,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 17:49:25,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230215691] [2020-09-04 17:49:25,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 17:49:25,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:25,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 17:49:25,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 17:49:25,039 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-04 17:49:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:25,072 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-09-04 17:49:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 17:49:25,073 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-04 17:49:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:25,084 INFO L225 Difference]: With dead ends: 48 [2020-09-04 17:49:25,084 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 17:49:25,089 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 17:49:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 17:49:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-04 17:49:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-04 17:49:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-09-04 17:49:25,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-09-04 17:49:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:25,129 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-09-04 17:49:25,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 17:49:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-09-04 17:49:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 17:49:25,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:25,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:25,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:49:25,130 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:25,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1900705936, now seen corresponding path program 1 times [2020-09-04 17:49:25,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:25,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478109815] [2020-09-04 17:49:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:25,134 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:25,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478109815] [2020-09-04 17:49:25,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:25,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:49:25,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348996891] [2020-09-04 17:49:25,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:49:25,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:25,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:49:25,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:49:25,196 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2020-09-04 17:49:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:25,222 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-09-04 17:49:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:49:25,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-04 17:49:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:25,225 INFO L225 Difference]: With dead ends: 29 [2020-09-04 17:49:25,225 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 17:49:25,227 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 17:49:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 17:49:25,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-04 17:49:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-04 17:49:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-04 17:49:25,235 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-09-04 17:49:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:25,236 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-04 17:49:25,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:49:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-04 17:49:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 17:49:25,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:25,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:25,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:49:25,238 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:25,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1024587775, now seen corresponding path program 1 times [2020-09-04 17:49:25,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:25,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80705760] [2020-09-04 17:49:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:27,457 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-09-04 17:49:27,510 INFO L273 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-09-04 17:49:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:27,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:27,586 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 17:49:27,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80705760] [2020-09-04 17:49:27,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:27,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:49:27,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904489673] [2020-09-04 17:49:27,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:49:27,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:49:27,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:49:27,640 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-09-04 17:49:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:27,681 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-09-04 17:49:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:49:27,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-04 17:49:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:27,683 INFO L225 Difference]: With dead ends: 38 [2020-09-04 17:49:27,683 INFO L226 Difference]: Without dead ends: 26 [2020-09-04 17:49:27,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:49:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-04 17:49:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-04 17:49:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 17:49:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-04 17:49:27,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-09-04 17:49:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:27,692 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-04 17:49:27,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:49:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-04 17:49:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 17:49:27,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:27,693 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] [2020-09-04 17:49:27,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:49:27,693 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:27,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2065885280, now seen corresponding path program 1 times [2020-09-04 17:49:27,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:27,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15643404] [2020-09-04 17:49:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:27,700 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:27,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:27,741 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 17:49:27,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15643404] [2020-09-04 17:49:27,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:27,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:49:27,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178748226] [2020-09-04 17:49:27,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:49:27,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:49:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:49:27,744 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-09-04 17:49:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:27,778 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-04 17:49:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 17:49:27,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-04 17:49:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:27,780 INFO L225 Difference]: With dead ends: 37 [2020-09-04 17:49:27,780 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 17:49:27,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:49:27,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 17:49:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-09-04 17:49:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 17:49:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-04 17:49:27,790 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-09-04 17:49:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:27,790 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-04 17:49:27,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:49:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-04 17:49:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 17:49:27,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:27,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:27,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:49:27,792 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1729554991, now seen corresponding path program 2 times [2020-09-04 17:49:27,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:27,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525224979] [2020-09-04 17:49:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:29,931 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:29,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:29,997 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 17:49:29,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525224979] [2020-09-04 17:49:29,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:29,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:49:29,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341023467] [2020-09-04 17:49:29,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:49:29,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:29,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:49:29,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:49:30,000 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-09-04 17:49:30,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:30,059 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-04 17:49:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:49:30,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-04 17:49:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:30,060 INFO L225 Difference]: With dead ends: 50 [2020-09-04 17:49:30,061 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 17:49:30,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:49:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 17:49:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-04 17:49:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 17:49:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-04 17:49:30,069 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2020-09-04 17:49:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:30,069 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-04 17:49:30,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:49:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-04 17:49:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 17:49:30,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:30,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:30,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:49:30,071 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1385563474, now seen corresponding path program 3 times [2020-09-04 17:49:30,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:30,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182389496] [2020-09-04 17:49:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:32,238 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:32,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:32,340 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 17:49:32,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182389496] [2020-09-04 17:49:32,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:32,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:49:32,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383272534] [2020-09-04 17:49:32,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:49:32,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:49:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:49:32,346 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-09-04 17:49:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:32,465 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-09-04 17:49:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 17:49:32,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-04 17:49:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:32,466 INFO L225 Difference]: With dead ends: 52 [2020-09-04 17:49:32,466 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 17:49:32,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:49:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 17:49:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-09-04 17:49:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 17:49:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-04 17:49:32,477 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2020-09-04 17:49:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:32,477 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-04 17:49:32,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:49:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-04 17:49:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 17:49:32,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:32,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:32,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:49:32,479 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1422203027, now seen corresponding path program 4 times [2020-09-04 17:49:32,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:32,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73909165] [2020-09-04 17:49:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:32,486 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:32,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:32,560 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 17:49:32,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73909165] [2020-09-04 17:49:32,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:32,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:49:32,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705220077] [2020-09-04 17:49:32,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:49:32,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:49:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:49:32,562 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-09-04 17:49:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:32,690 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-09-04 17:49:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 17:49:32,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-04 17:49:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:32,691 INFO L225 Difference]: With dead ends: 54 [2020-09-04 17:49:32,692 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 17:49:32,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:49:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 17:49:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-04 17:49:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 17:49:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-04 17:49:32,700 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-09-04 17:49:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:32,700 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-04 17:49:32,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:49:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-04 17:49:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 17:49:32,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:32,702 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:32,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:49:32,702 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:32,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2021892204, now seen corresponding path program 5 times [2020-09-04 17:49:32,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:32,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738906065] [2020-09-04 17:49:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:34,845 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:34,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:34,965 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 17:49:34,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738906065] [2020-09-04 17:49:34,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:34,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:49:34,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270831223] [2020-09-04 17:49:34,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:49:34,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:34,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:49:34,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:49:34,970 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states. [2020-09-04 17:49:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:35,142 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-09-04 17:49:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:49:35,144 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-04 17:49:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:35,145 INFO L225 Difference]: With dead ends: 56 [2020-09-04 17:49:35,145 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 17:49:35,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:49:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 17:49:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-04 17:49:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 17:49:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-09-04 17:49:35,160 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2020-09-04 17:49:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:35,161 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-09-04 17:49:35,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:49:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-09-04 17:49:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 17:49:35,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:35,174 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:35,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:49:35,175 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:35,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:35,175 INFO L82 PathProgramCache]: Analyzing trace with hash 377623979, now seen corresponding path program 6 times [2020-09-04 17:49:35,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:35,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027834357] [2020-09-04 17:49:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:35,183 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:35,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:35,278 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 17:49:35,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027834357] [2020-09-04 17:49:35,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:35,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:49:35,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201406926] [2020-09-04 17:49:35,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:49:35,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:35,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:49:35,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:49:35,280 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 10 states. [2020-09-04 17:49:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:35,480 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-09-04 17:49:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 17:49:35,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-09-04 17:49:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:35,482 INFO L225 Difference]: With dead ends: 58 [2020-09-04 17:49:35,483 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 17:49:35,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:49:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 17:49:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-04 17:49:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 17:49:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-09-04 17:49:35,492 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2020-09-04 17:49:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:35,492 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-09-04 17:49:35,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:49:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-09-04 17:49:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 17:49:35,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:35,494 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:35,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:49:35,495 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:35,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash 783824682, now seen corresponding path program 7 times [2020-09-04 17:49:35,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:35,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928862403] [2020-09-04 17:49:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:35,502 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:35,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:35,606 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 17:49:35,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928862403] [2020-09-04 17:49:35,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:35,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:49:35,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742908705] [2020-09-04 17:49:35,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:49:35,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:35,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:49:35,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:49:35,609 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 11 states. [2020-09-04 17:49:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:35,846 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-09-04 17:49:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 17:49:35,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-04 17:49:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:35,848 INFO L225 Difference]: With dead ends: 60 [2020-09-04 17:49:35,848 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 17:49:35,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-04 17:49:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 17:49:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-09-04 17:49:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-04 17:49:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-09-04 17:49:35,856 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 37 [2020-09-04 17:49:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:35,857 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-09-04 17:49:35,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:49:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-09-04 17:49:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 17:49:35,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:35,858 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:35,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:49:35,859 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:35,859 INFO L82 PathProgramCache]: Analyzing trace with hash 300676329, now seen corresponding path program 8 times [2020-09-04 17:49:35,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:35,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176434629] [2020-09-04 17:49:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:35,868 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:35,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:35,982 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 17:49:35,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176434629] [2020-09-04 17:49:35,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:35,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:49:35,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582812635] [2020-09-04 17:49:35,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:49:35,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:35,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:49:35,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:49:35,986 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 12 states. [2020-09-04 17:49:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:36,268 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-09-04 17:49:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:49:36,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-09-04 17:49:36,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:36,270 INFO L225 Difference]: With dead ends: 62 [2020-09-04 17:49:36,270 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 17:49:36,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-09-04 17:49:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 17:49:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-04 17:49:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 17:49:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-09-04 17:49:36,290 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 39 [2020-09-04 17:49:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:36,291 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-09-04 17:49:36,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:49:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-09-04 17:49:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:49:36,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:36,292 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:36,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:49:36,293 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash -148422936, now seen corresponding path program 9 times [2020-09-04 17:49:36,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:36,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342701029] [2020-09-04 17:49:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:36,305 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:36,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:36,468 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 17:49:36,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342701029] [2020-09-04 17:49:36,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:36,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:49:36,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306092707] [2020-09-04 17:49:36,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 17:49:36,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 17:49:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:49:36,470 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 13 states. [2020-09-04 17:49:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:36,814 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-09-04 17:49:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 17:49:36,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-09-04 17:49:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:36,816 INFO L225 Difference]: With dead ends: 64 [2020-09-04 17:49:36,816 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 17:49:36,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-09-04 17:49:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 17:49:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-04 17:49:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 17:49:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-04 17:49:36,825 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2020-09-04 17:49:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:36,825 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-04 17:49:36,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 17:49:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-04 17:49:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 17:49:36,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:36,827 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:36,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 17:49:36,827 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2058880295, now seen corresponding path program 10 times [2020-09-04 17:49:36,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:36,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296219919] [2020-09-04 17:49:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:36,835 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:36,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:36,880 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 17:49:36,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296219919] [2020-09-04 17:49:36,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:36,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:49:36,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290302637] [2020-09-04 17:49:36,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:49:36,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:49:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:49:36,882 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-09-04 17:49:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:36,910 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-09-04 17:49:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:49:36,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-09-04 17:49:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:36,914 INFO L225 Difference]: With dead ends: 60 [2020-09-04 17:49:36,914 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 17:49:36,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:49:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 17:49:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-09-04 17:49:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 17:49:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-09-04 17:49:36,933 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2020-09-04 17:49:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:36,933 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-09-04 17:49:36,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:49:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-09-04 17:49:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 17:49:36,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:36,934 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:36,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 17:49:36,939 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:36,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:36,939 INFO L82 PathProgramCache]: Analyzing trace with hash -135810616, now seen corresponding path program 11 times [2020-09-04 17:49:36,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:36,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442918976] [2020-09-04 17:49:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:36,952 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:37,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:37,040 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 17:49:37,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442918976] [2020-09-04 17:49:37,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:37,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:49:37,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818939407] [2020-09-04 17:49:37,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:49:37,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:37,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:49:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:49:37,042 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 5 states. [2020-09-04 17:49:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:37,066 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-09-04 17:49:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:49:37,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-09-04 17:49:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:37,067 INFO L225 Difference]: With dead ends: 71 [2020-09-04 17:49:37,067 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:49:37,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:49:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:49:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:49:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:49:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:49:37,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-09-04 17:49:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:37,069 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:49:37,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:49:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:49:37,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:49:37,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 17:49:37,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:49:37,377 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:49:37,377 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:49:37,378 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:49:37,378 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 17:49:37,378 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:49:37,378 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:49:37,378 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:37,378 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:37,378 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 17:49:37,379 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-04 17:49:37,379 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:37,379 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: false [2020-09-04 17:49:37,379 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 30) the Hoare annotation is: true [2020-09-04 17:49:37,379 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-09-04 17:49:37,379 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (or (= main_~k~0 4) (and (<= main_~i~0 0) (<= (+ main_~j~0 100) 0))) [2020-09-04 17:49:37,379 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (<= main_~i~0 0) [2020-09-04 17:49:37,380 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-09-04 17:49:37,380 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 30) the Hoare annotation is: true [2020-09-04 17:49:37,380 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-09-04 17:49:37,380 INFO L271 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-09-04 17:49:37,381 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= main_~k~0 4) [2020-09-04 17:49:37,381 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (= main_~k~0 4) (and (<= main_~i~0 0) (<= (+ main_~j~0 100) 0))) [2020-09-04 17:49:37,381 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-09-04 17:49:37,381 INFO L264 CegarLoopResult]: At program point L20-3(lines 20 22) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-09-04 17:49:37,381 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (<= main_~i~0 0) [2020-09-04 17:49:37,381 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= main_~k~0 4) [2020-09-04 17:49:37,382 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 17:49:37,383 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-09-04 17:49:37,383 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 17:49:37,384 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-09-04 17:49:37,384 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:49:37,384 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:49:37,384 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-09-04 17:49:37,384 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:49:37,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:49:37 BoogieIcfgContainer [2020-09-04 17:49:37,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:49:37,423 INFO L168 Benchmark]: Toolchain (without parser) took 13480.06 ms. Allocated memory was 146.8 MB in the beginning and 271.1 MB in the end (delta: 124.3 MB). Free memory was 102.9 MB in the beginning and 191.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:37,424 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:49:37,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.96 ms. Allocated memory is still 146.8 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:37,426 INFO L168 Benchmark]: Boogie Preprocessor took 33.86 ms. Allocated memory is still 146.8 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:37,439 INFO L168 Benchmark]: RCFGBuilder took 425.99 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 170.1 MB in the end (delta: -78.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:37,440 INFO L168 Benchmark]: TraceAbstraction took 12719.56 ms. Allocated memory was 203.9 MB in the beginning and 271.1 MB in the end (delta: 67.1 MB). Free memory was 170.1 MB in the beginning and 191.1 MB in the end (delta: -21.0 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:37,446 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.96 ms. Allocated memory is still 146.8 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.86 ms. Allocated memory is still 146.8 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.99 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 170.1 MB in the end (delta: -78.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12719.56 ms. Allocated memory was 203.9 MB in the beginning and 271.1 MB in the end (delta: 67.1 MB). Free memory was 170.1 MB in the beginning and 191.1 MB in the end (delta: -21.0 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: k == 4 || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: k == 4 || (i <= 0 && j + 100 <= 0) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.2s, OverallIterations: 14, TraceHistogramMax: 9, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 300 SDtfs, 136 SDslu, 1063 SDs, 0 SdLazy, 570 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=13, 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, 14 MinimizatonAttempts, 12 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 113 PreInvPairs, 187 NumberOfFragments, 90 HoareAnnotationTreeSize, 113 FomulaSimplifications, 5866 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 29 FomulaSimplificationsInter, 223 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...