/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:59:46,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:59:46,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:59:46,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:59:46,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:59:46,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:59:46,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:59:46,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:59:46,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:59:46,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:59:46,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:59:46,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:59:46,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:59:46,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:59:46,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:59:46,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:59:46,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:59:46,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:59:46,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:59:46,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:59:46,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:59:46,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:59:46,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:59:46,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:59:46,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:59:46,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:59:46,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:59:46,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:59:46,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 11:59:46,573 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:59:46,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:59:46,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:59:46,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:59:46,577 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:59:46,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:59:46,577 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:59:46,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:59:46,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:59:46,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:59:46,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:59:46,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:59:46,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:59:46,580 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:59:46,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:59:46,580 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:59:46,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:59:46,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:59:46,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:59:46,581 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:59:46,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:59:46,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:59:46,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:59:46,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:59:46,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:59:46,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:59:46,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:59:46,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:59:46,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:59:46,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:59:46,994 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:59:47,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:59:47,022 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:59:47,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:59:47,025 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:59:47,026 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-17 11:59:47,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84750098/8b344f1287284e5893bffcbb062d130c/FLAG2ce82815b [2020-07-17 11:59:47,533 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:59:47,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-17 11:59:47,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84750098/8b344f1287284e5893bffcbb062d130c/FLAG2ce82815b [2020-07-17 11:59:47,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84750098/8b344f1287284e5893bffcbb062d130c [2020-07-17 11:59:47,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:59:47,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:59:47,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:47,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:59:47,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:59:47,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:47" (1/1) ... [2020-07-17 11:59:47,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d44950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:47, skipping insertion in model container [2020-07-17 11:59:47,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:47" (1/1) ... [2020-07-17 11:59:47,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:59:48,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:59:48,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:48,210 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:59:48,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:48,241 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:59:48,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48 WrapperNode [2020-07-17 11:59:48,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:48,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:59:48,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:59:48,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:59:48,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (1/1) ... [2020-07-17 11:59:48,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (1/1) ... [2020-07-17 11:59:48,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (1/1) ... [2020-07-17 11:59:48,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (1/1) ... [2020-07-17 11:59:48,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (1/1) ... [2020-07-17 11:59:48,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (1/1) ... [2020-07-17 11:59:48,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (1/1) ... [2020-07-17 11:59:48,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:59:48,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:59:48,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:59:48,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:59:48,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:59:48,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:59:48,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:59:48,408 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-17 11:59:48,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:59:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:59:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:59:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-17 11:59:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:59:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:59:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:59:48,624 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:59:48,625 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:59:48,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:48 BoogieIcfgContainer [2020-07-17 11:59:48,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:59:48,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:59:48,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:59:48,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:59:48,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:59:47" (1/3) ... [2020-07-17 11:59:48,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca38369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:48, skipping insertion in model container [2020-07-17 11:59:48,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:48" (2/3) ... [2020-07-17 11:59:48,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca38369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:48, skipping insertion in model container [2020-07-17 11:59:48,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:48" (3/3) ... [2020-07-17 11:59:48,642 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-07-17 11:59:48,654 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:59:48,666 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:59:48,682 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:59:48,711 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:59:48,712 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:59:48,712 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:59:48,713 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:59:48,713 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:59:48,713 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:59:48,713 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:59:48,713 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:59:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-17 11:59:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 11:59:48,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:48,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:48,755 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-17 11:59:48,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:48,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381062613] [2020-07-17 11:59:48,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:59:49,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381062613] [2020-07-17 11:59:49,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:59:49,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:59:49,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387765297] [2020-07-17 11:59:49,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:59:49,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:49,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:59:49,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:49,076 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-17 11:59:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:49,148 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-17 11:59:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:59:49,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-17 11:59:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:49,161 INFO L225 Difference]: With dead ends: 30 [2020-07-17 11:59:49,161 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 11:59:49,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:59:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 11:59:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-17 11:59:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 11:59:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-17 11:59:49,212 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-17 11:59:49,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:49,212 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-17 11:59:49,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:59:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-17 11:59:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 11:59:49,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:49,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:49,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:59:49,216 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-17 11:59:49,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:49,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282955027] [2020-07-17 11:59:49,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:49,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282955027] [2020-07-17 11:59:49,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592136585] [2020-07-17 11:59:49,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:59:49,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:49,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:49,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-17 11:59:49,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880002104] [2020-07-17 11:59:49,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 11:59:49,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:49,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 11:59:49,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 11:59:49,473 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-17 11:59:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:49,532 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-17 11:59:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 11:59:49,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-17 11:59:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:49,534 INFO L225 Difference]: With dead ends: 25 [2020-07-17 11:59:49,534 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 11:59:49,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:59:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 11:59:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 11:59:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 11:59:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-17 11:59:49,543 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-17 11:59:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:49,544 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-17 11:59:49,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 11:59:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-17 11:59:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 11:59:49,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:49,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:49,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 11:59:49,761 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-17 11:59:49,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:49,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232161748] [2020-07-17 11:59:49,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:49,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232161748] [2020-07-17 11:59:49,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594814119] [2020-07-17 11:59:49,926 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:49,958 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:49,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:49,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:59:49,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:50,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:50,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-17 11:59:50,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631068258] [2020-07-17 11:59:50,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 11:59:50,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:50,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 11:59:50,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:59:50,004 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-17 11:59:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:50,071 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-17 11:59:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 11:59:50,072 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-17 11:59:50,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:50,073 INFO L225 Difference]: With dead ends: 28 [2020-07-17 11:59:50,073 INFO L226 Difference]: Without dead ends: 24 [2020-07-17 11:59:50,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:59:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-17 11:59:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-17 11:59:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-17 11:59:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-17 11:59:50,081 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-17 11:59:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:50,082 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-17 11:59:50,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 11:59:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-17 11:59:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 11:59:50,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:50,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:50,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:50,299 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:50,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-17 11:59:50,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:50,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710273739] [2020-07-17 11:59:50,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 11:59:50,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710273739] [2020-07-17 11:59:50,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479972163] [2020-07-17 11:59:50,460 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:50,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 11:59:50,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:50,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 11:59:50,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 11:59:50,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:50,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-17 11:59:50,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361696041] [2020-07-17 11:59:50,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 11:59:50,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:50,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 11:59:50,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:59:50,539 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-17 11:59:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:50,612 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-17 11:59:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 11:59:50,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-17 11:59:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:50,614 INFO L225 Difference]: With dead ends: 31 [2020-07-17 11:59:50,614 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 11:59:50,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-07-17 11:59:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 11:59:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-17 11:59:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 11:59:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-17 11:59:50,621 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-17 11:59:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:50,621 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-17 11:59:50,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 11:59:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-17 11:59:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 11:59:50,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:50,623 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:50,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:50,836 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-17 11:59:50,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:50,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954741881] [2020-07-17 11:59:50,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 11:59:51,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954741881] [2020-07-17 11:59:51,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042129361] [2020-07-17 11:59:51,075 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-17 11:59:51,103 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:59:51,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:51,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-17 11:59:51,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 11:59:51,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:51,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-17 11:59:51,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104528663] [2020-07-17 11:59:51,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 11:59:51,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 11:59:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:59:51,146 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-17 11:59:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:51,234 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-17 11:59:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 11:59:51,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-17 11:59:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:51,236 INFO L225 Difference]: With dead ends: 34 [2020-07-17 11:59:51,236 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 11:59:51,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-17 11:59:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 11:59:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 11:59:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 11:59:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-17 11:59:51,244 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-17 11:59:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:51,244 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-17 11:59:51,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 11:59:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-17 11:59:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-17 11:59:51,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:51,246 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:51,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:51,461 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:51,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-17 11:59:51,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:51,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434432400] [2020-07-17 11:59:51,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 11:59:51,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434432400] [2020-07-17 11:59:51,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186378618] [2020-07-17 11:59:51,640 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:51,688 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-17 11:59:51,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:51,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 11:59:51,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 11:59:51,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:51,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-17 11:59:51,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996909033] [2020-07-17 11:59:51,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 11:59:51,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:51,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 11:59:51,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:59:51,749 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-17 11:59:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:51,857 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-17 11:59:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 11:59:51,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-17 11:59:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:51,859 INFO L225 Difference]: With dead ends: 37 [2020-07-17 11:59:51,859 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 11:59:51,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-07-17 11:59:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 11:59:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-17 11:59:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 11:59:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-17 11:59:51,866 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-17 11:59:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:51,867 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-17 11:59:51,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 11:59:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-17 11:59:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-17 11:59:51,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:51,869 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:52,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 11:59:52,084 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-17 11:59:52,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:52,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427793751] [2020-07-17 11:59:52,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 11:59:52,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427793751] [2020-07-17 11:59:52,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778892949] [2020-07-17 11:59:52,251 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:52,295 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-17 11:59:52,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:52,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-17 11:59:52,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 11:59:52,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:52,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-17 11:59:52,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232146986] [2020-07-17 11:59:52,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 11:59:52,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:52,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 11:59:52,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-17 11:59:52,359 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-17 11:59:52,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:52,461 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-17 11:59:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 11:59:52,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-17 11:59:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:52,465 INFO L225 Difference]: With dead ends: 40 [2020-07-17 11:59:52,465 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 11:59:52,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-17 11:59:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 11:59:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-17 11:59:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-17 11:59:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-17 11:59:52,476 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-17 11:59:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:52,477 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-17 11:59:52,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 11:59:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-17 11:59:52,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 11:59:52,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:52,482 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:52,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:52,683 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:52,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-17 11:59:52,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:52,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278866874] [2020-07-17 11:59:52,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 11:59:52,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278866874] [2020-07-17 11:59:52,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287755889] [2020-07-17 11:59:52,897 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:52,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-17 11:59:52,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 11:59:52,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:52,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-17 11:59:52,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111242781] [2020-07-17 11:59:52,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 11:59:52,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 11:59:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-17 11:59:52,990 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-17 11:59:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:53,116 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-17 11:59:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 11:59:53,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-17 11:59:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:53,118 INFO L225 Difference]: With dead ends: 43 [2020-07-17 11:59:53,118 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 11:59:53,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-17 11:59:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 11:59:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-17 11:59:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 11:59:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-17 11:59:53,125 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-17 11:59:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:53,126 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-17 11:59:53,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 11:59:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-17 11:59:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 11:59:53,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:53,128 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:53,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:53,329 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:53,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-17 11:59:53,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:53,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074074315] [2020-07-17 11:59:53,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 11:59:53,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074074315] [2020-07-17 11:59:53,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429511680] [2020-07-17 11:59:53,556 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:53,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:53,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:53,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-17 11:59:53,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 11:59:53,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:53,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-17 11:59:53,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962133761] [2020-07-17 11:59:53,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 11:59:53,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:53,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 11:59:53,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:59:53,645 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-17 11:59:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:53,794 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-17 11:59:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 11:59:53,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-17 11:59:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:53,796 INFO L225 Difference]: With dead ends: 46 [2020-07-17 11:59:53,796 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 11:59:53,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-17 11:59:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 11:59:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 11:59:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 11:59:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-17 11:59:53,804 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-17 11:59:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:53,805 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-17 11:59:53,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 11:59:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-17 11:59:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 11:59:53,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:53,806 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:54,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 11:59:54,013 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-17 11:59:54,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:54,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407387514] [2020-07-17 11:59:54,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 11:59:54,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407387514] [2020-07-17 11:59:54,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100575695] [2020-07-17 11:59:54,289 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:54,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-17 11:59:54,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:54,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-17 11:59:54,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 11:59:54,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:54,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-17 11:59:54,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953382229] [2020-07-17 11:59:54,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 11:59:54,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 11:59:54,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-17 11:59:54,402 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-17 11:59:54,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:54,547 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-17 11:59:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 11:59:54,548 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-17 11:59:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:54,549 INFO L225 Difference]: With dead ends: 49 [2020-07-17 11:59:54,549 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 11:59:54,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-17 11:59:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 11:59:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-17 11:59:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 11:59:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-17 11:59:54,557 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-17 11:59:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:54,557 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-17 11:59:54,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 11:59:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-17 11:59:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-17 11:59:54,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:54,559 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:54,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:54,777 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:54,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-17 11:59:54,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:54,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572817541] [2020-07-17 11:59:54,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-17 11:59:55,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572817541] [2020-07-17 11:59:55,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150526304] [2020-07-17 11:59:55,151 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:55,194 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:59:55,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:55,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-17 11:59:55,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-17 11:59:55,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:55,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-17 11:59:55,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502680034] [2020-07-17 11:59:55,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 11:59:55,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 11:59:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-17 11:59:55,249 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-17 11:59:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:55,432 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-17 11:59:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 11:59:55,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-17 11:59:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:55,435 INFO L225 Difference]: With dead ends: 52 [2020-07-17 11:59:55,435 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 11:59:55,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-17 11:59:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 11:59:55,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-17 11:59:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 11:59:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-17 11:59:55,448 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-17 11:59:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:55,448 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-17 11:59:55,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 11:59:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-17 11:59:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 11:59:55,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:55,452 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:55,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:55,653 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-17 11:59:55,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:55,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76453336] [2020-07-17 11:59:55,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-17 11:59:56,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76453336] [2020-07-17 11:59:56,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207036553] [2020-07-17 11:59:56,064 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:56,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-17 11:59:56,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:56,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-17 11:59:56,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-17 11:59:56,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:56,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-17 11:59:56,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14009390] [2020-07-17 11:59:56,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 11:59:56,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:56,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 11:59:56,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-17 11:59:56,206 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-17 11:59:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:56,371 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-17 11:59:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 11:59:56,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-17 11:59:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:56,372 INFO L225 Difference]: With dead ends: 55 [2020-07-17 11:59:56,372 INFO L226 Difference]: Without dead ends: 51 [2020-07-17 11:59:56,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-17 11:59:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-17 11:59:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-17 11:59:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 11:59:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-17 11:59:56,388 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-17 11:59:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:56,389 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-17 11:59:56,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 11:59:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-17 11:59:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-17 11:59:56,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:56,390 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:56,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-17 11:59:56,601 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-17 11:59:56,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:56,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465391392] [2020-07-17 11:59:56,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-17 11:59:57,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465391392] [2020-07-17 11:59:57,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269293373] [2020-07-17 11:59:57,151 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:57,197 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-17 11:59:57,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:57,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-17 11:59:57,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-17 11:59:57,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:57,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-17 11:59:57,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065638686] [2020-07-17 11:59:57,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 11:59:57,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:57,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 11:59:57,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-17 11:59:57,257 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-17 11:59:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:57,489 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-17 11:59:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 11:59:57,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-17 11:59:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:57,493 INFO L225 Difference]: With dead ends: 58 [2020-07-17 11:59:57,493 INFO L226 Difference]: Without dead ends: 54 [2020-07-17 11:59:57,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-07-17 11:59:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-17 11:59:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-17 11:59:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 11:59:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-17 11:59:57,508 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-17 11:59:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:57,508 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-17 11:59:57,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 11:59:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-17 11:59:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-17 11:59:57,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:57,510 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:57,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-17 11:59:57,711 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:57,711 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-17 11:59:57,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:57,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935274105] [2020-07-17 11:59:57,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-17 11:59:58,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935274105] [2020-07-17 11:59:58,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269373909] [2020-07-17 11:59:58,179 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,237 INFO L264 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-17 11:59:58,240 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-17 11:59:58,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:58,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-17 11:59:58,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420311290] [2020-07-17 11:59:58,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 11:59:58,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 11:59:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-17 11:59:58,317 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-17 11:59:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:58,536 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-17 11:59:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 11:59:58,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-17 11:59:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:58,538 INFO L225 Difference]: With dead ends: 61 [2020-07-17 11:59:58,538 INFO L226 Difference]: Without dead ends: 57 [2020-07-17 11:59:58,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 11:59:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-17 11:59:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-17 11:59:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:59:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-17 11:59:58,555 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-17 11:59:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:58,556 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-17 11:59:58,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 11:59:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-17 11:59:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-17 11:59:58,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:58,559 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:58,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-17 11:59:58,760 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:58,760 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-17 11:59:58,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:58,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480320841] [2020-07-17 11:59:58,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-17 11:59:59,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480320841] [2020-07-17 11:59:59,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975657843] [2020-07-17 11:59:59,327 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:59,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:59,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:59,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-17 11:59:59,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-17 11:59:59,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:59,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-17 11:59:59,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801866955] [2020-07-17 11:59:59,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 11:59:59,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 11:59:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-17 11:59:59,441 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-17 11:59:59,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:59,656 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-17 11:59:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 11:59:59,657 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-17 11:59:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:59,658 INFO L225 Difference]: With dead ends: 64 [2020-07-17 11:59:59,658 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 11:59:59,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 11:59:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 11:59:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-17 11:59:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 11:59:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-17 11:59:59,665 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-17 11:59:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:59,666 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-17 11:59:59,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 11:59:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-17 11:59:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-17 11:59:59,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:59,667 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:59,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:59,882 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:59,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-17 11:59:59,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:59,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037094872] [2020-07-17 11:59:59,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-17 12:00:01,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037094872] [2020-07-17 12:00:01,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567815515] [2020-07-17 12:00:01,100 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:01,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-17 12:00:01,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:01,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-17 12:00:01,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-17 12:00:01,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:01,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-07-17 12:00:01,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126232405] [2020-07-17 12:00:01,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-17 12:00:01,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:01,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-17 12:00:01,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 12:00:01,292 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-07-17 12:00:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:01,789 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-17 12:00:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 12:00:01,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-07-17 12:00:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:01,791 INFO L225 Difference]: With dead ends: 67 [2020-07-17 12:00:01,791 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 12:00:01,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 12:00:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 12:00:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-17 12:00:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-17 12:00:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-17 12:00:01,803 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-17 12:00:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:01,804 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-17 12:00:01,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-17 12:00:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-17 12:00:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-17 12:00:01,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:01,806 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:02,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-17 12:00:02,020 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-17 12:00:02,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:02,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570883721] [2020-07-17 12:00:02,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-17 12:00:02,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570883721] [2020-07-17 12:00:02,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873188754] [2020-07-17 12:00:02,700 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:02,760 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:00:02,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:02,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-17 12:00:02,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-17 12:00:02,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:00:02,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 24 [2020-07-17 12:00:02,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542662108] [2020-07-17 12:00:02,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 12:00:02,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 12:00:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-07-17 12:00:02,854 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-07-17 12:00:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:03,233 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-07-17 12:00:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 12:00:03,234 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-07-17 12:00:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:03,234 INFO L225 Difference]: With dead ends: 63 [2020-07-17 12:00:03,235 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:00:03,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 12:00:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:00:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:00:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:00:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:00:03,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-07-17 12:00:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:03,237 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:00:03,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 12:00:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:00:03,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:00:03,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-17 12:00:03,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:00:03,475 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:00:03,475 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:00:03,475 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:00:03,475 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:00:03,476 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:00:03,476 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:00:03,476 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-17 12:00:03,476 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-17 12:00:03,476 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-17 12:00:03,477 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-17 12:00:03,477 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-17 12:00:03,477 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 15 main_~input~0) (<= main_~input~0 15)) [2020-07-17 12:00:03,477 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-17 12:00:03,477 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-17 12:00:03,477 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-17 12:00:03,477 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-17 12:00:03,477 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-17 12:00:03,478 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-17 12:00:03,478 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-17 12:00:03,478 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-17 12:00:03,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:00:03 BoogieIcfgContainer [2020-07-17 12:00:03,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:00:03,486 INFO L168 Benchmark]: Toolchain (without parser) took 15524.77 ms. Allocated memory was 138.9 MB in the beginning and 399.0 MB in the end (delta: 260.0 MB). Free memory was 103.5 MB in the beginning and 355.0 MB in the end (delta: -251.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:03,486 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 12:00:03,487 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.15 ms. Allocated memory is still 138.9 MB. Free memory was 103.1 MB in the beginning and 93.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:03,487 INFO L168 Benchmark]: Boogie Preprocessor took 27.94 ms. Allocated memory is still 138.9 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:03,488 INFO L168 Benchmark]: RCFGBuilder took 360.30 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 92.5 MB in the beginning and 167.2 MB in the end (delta: -74.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:03,489 INFO L168 Benchmark]: TraceAbstraction took 14849.46 ms. Allocated memory was 198.7 MB in the beginning and 399.0 MB in the end (delta: 200.3 MB). Free memory was 166.6 MB in the beginning and 355.0 MB in the end (delta: -188.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:03,491 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.15 ms. Allocated memory is still 138.9 MB. Free memory was 103.1 MB in the beginning and 93.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.94 ms. Allocated memory is still 138.9 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.30 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 92.5 MB in the beginning and 167.2 MB in the end (delta: -74.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14849.46 ms. Allocated memory was 198.7 MB in the beginning and 399.0 MB in the end (delta: 200.3 MB). Free memory was 166.6 MB in the beginning and 355.0 MB in the end (delta: -188.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.7s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 526 SDslu, 2176 SDs, 0 SdLazy, 1348 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1705 GetRequests, 1331 SyntacticMatches, 4 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 407376 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2400 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...